Astronomers Discovered the Fastest-Growing Black Hole Ever Seen ( 54

Long-time Slashdot reader Yhcrana shares "some good old fashioned astronomy news." Astronomers have discovered "a black hole 20 billion times the mass of the sun eating the equivalent of a star every two days," reports the New York Times. The black hole is growing so rapidly, said Christian Wolf, of the Australian National University, who led the team that found it in the depths of time, "that it is probably 10,000 times brighter than the galaxy it lives in." So bright, that it is dazzling our view and we can't see the galaxy itself. He and his colleagues announced the discovery in a paper to be published in the Publications of the Astronomical Society of Australia...

The blaze from material swirling around this newly observed drainpipe into eternity -- known officially as SMSS J215728.21-360215.1 -- is as luminous as 700 trillion suns, according to Wolf and his collaborators. If it were at the center of our own galaxy, the Milky Way, it would be 10 times brighter than the moon and bathe the Earth in so many X-rays that life would be impossible. Luckily it's not anywhere nearby. It is in fact 12 billion light years away, which means it took that long for its light to reach us, so we are glimpsing this cataclysm as it appeared at the dawn of time, only 2 billion years after the Big Bang, when stars and galaxies were furiously forming.


In Virtual Reality, How Much Body Do You Need? ( 34

An anonymous reader quotes a report from The New York Times: Will it soon be possible to simulate the feeling of a spirit not attached to any particular physical form using virtual or augmented reality? If so, a good place to start would be to figure out the minimal amount of body we need to feel a sense of self, especially in digital environments where more and more people may find themselves for work or play. It might be as little as a pair of hands and feet, report Dr. Michiteru Kitazaki and a Ph.D. student, Ryota Kondo. In a paper published Tuesday in Scientific Reports, they showed that animating virtual hands and feet alone is enough to make people feel their sense of body drift toward an invisible avatar (Warning: source may be paywalled; alternative source). Their work fits into a corpus of research on illusory body ownership, which has challenged understandings of perception and contributed to therapies like treating pain for amputees who experience phantom limb.

Using an Oculus Rift virtual reality headset and a motion sensor, Dr. Kitazaki's team performed a series of experiments in which volunteers watched disembodied hands and feet move two meters in front of them in a virtual room. In one experiment, when the hands and feet mirrored the participants' own movements, people reported feeling as if the space between the appendages were their own bodies. In another experiment, the scientists induced illusory ownership of an invisible body, then blacked out the headset display, effectively blindfolding the subjects. The researchers then pulled them a random distance back and asked them to return to their original position, still virtually blindfolded. Consistently, the participants overshot their starting point, suggesting that their sense of body had drifted or "projected" forward, toward the transparent avatar.


Elon Musk Pitches 150 MPH Rides In Boring Company Tunnels For $1 ( 70

An anonymous reader quotes a report from Engadget: At The Boring Company Information Session not all of the talk centered on flamethrowers. Elon Musk and project leader Steve Davis described many details of their visions for an underground network that could alleviate traffic problems in big cities. Musk said "we're not suggesting this to the exclusion of other approaches," but did take a moment to call out flying taxi solutions (like Uber Elevate) right off the bat due to danger and noise.

Earlier in the evening Musk retweeted an LA Metro tweet that said it's coordinating with The Boring Company on its test and said the two will be "partners" going forward. Much of what Musk discussed about how his concept in-city Loop would work has been answered in concept videos and the company's FAQ, but he specifically said that the plan is for rides that cost a $1, and carry up to 16 passengers through hundreds of tunnels to those small, parking space-size tunnels located throughout a city. Test runs in the loop have already hit a couple of hundred miles an hour, and Musk's plan is for vacuum Hyperloop tubes between cities that enable travel in pressurized carts at up to 300 MPH. That's compared to 150 MPH in the in-city Loop carts, all without slowing down due to traffic or anything else. The main concern is hitting speeds that are still comfortable for people inside.
The timeframe for when the "weird little Disney ride in the middle of LA" will be available to the public is unclear.

US Government Wants To Start Charging For Landsat, the Best Free Satellite Data On Earth ( 234

The U.S. government may begin charging users for access to five decades of satellite images of Earth. Quartz reports: Nature reports that the Department of Interior has asked an advisory board to consider the consequences of charging for the data generated by the Landsat program, which is the largest continuously collected set of Earth images taken in space and has been freely available to the public since 2008. Since 1972, Landsat has used eight different satellites to gather images of the Earth, with a ninth currently slated for a December 2020 launch. The data are widely used by government agencies, and since it became free, by an increasing number of academics, private companies and journalists. "As of March 31, 2018, more than 75 million Landsat scenes have been downloaded from the USGS-managed archive!" the agency noted on the 10th anniversary of the program.

Now, the government says the cost of sharing the data has grown as more people access it. Advocates for open data say the public benefit produced through research and business activity far outweigh those costs. A 2013 survey cited by Nature found that the dataset generated $2 billion in economic activity, compared to an $80 million budget for the program.


NASA's Atomic Fridge Will Make the ISS the Coldest Known Place in the Universe ( 97

An anonymous reader shares a report: Later this year, a small part of the International Space Station will become 10 billion times colder than the average temperature of the vacuum of space thanks to the Cold Atom Lab (CAL). Once it's on the space station, this atomic fridge will be the coldest known place in the universe and will allow physicists to 'see' into the quantum realm in a way that would never be possible on Earth.

In a normal room, "atoms are bouncing off one another in all directions at a few hundred meters per second," Rob Thompson, a NASA scientist working on CAL explained in a statement. CAL, however, can reach temperatures that are just one ten billionth of a degree above absolute zero -- the point at which matter loses all its thermal energy -- which means that this chaotic atomic motion comes to a near standstill.

CAL uses magnetic fields and lasers traps to capture the gaseous atoms and cool them to nearly absolute zero. Since all the atoms have the same energy levels at that point, these effectively motionless atoms condense into a state of quantum matter called a Bose-Einstein condensate. This state of matter means that the atoms have the properties of one continuous wave rather discrete particles.


Moon of Jupiter Prime Candidate For Alien Life After Water Blast Found ( 133

A NASA probe that explored Jupiter's moon Europa flew through a giant plume of water vapour that erupted from the icy surface and reached a hundred miles high, according to a fresh analysis of the spacecraft's data. An anonymous reader shares a The Guardian report: The discovery has cemented the view among some scientists that the Jovian moon, one of four first spotted by the Italian astronomer Galileo Galilei in 1610, is the most promising place in the solar system to hunt for alien life. If such geysers are common on Europa, NASA and European Space Agency (ESA) missions that are already in the pipeline could fly through and look for signs of life in the brine, which comes from a vast subsurface ocean containing twice as much water as all the oceans on Earth.

NASA's Galileo spacecraft spent eight years in orbit around Jupiter and made its closest pass over Europa, a moon about the size of our own, on 16 December 1997. As the probe dropped beneath an altitude of 250 miles, its sensors twitched with unexpected signals that scientists were unable to explain at the time. Now, in a new study, the researchers describe how they went back to the Galileo data after grainy images beamed home from the Hubble space telescope in 2016 showed what appeared to be plumes of water blasting from Europa's surface.

The Internet

The Rise of Free Urban Internet ( 78

Intersection, the Alphabet-backed smart cities startup known for creating free internet kiosks for cities, is pushing to make free internet accessible in as many major cities as possible across the globe. From a report: As more aspects of our daily lives -- from healthcare to communication to travel -- become dependent on internet-connected devices, the concept of providing internet as a public good is becoming more widespread. Intersection is best known for its successful transformation of NYC's 7,500 pay-phones into free internet kiosks that act as hot-spots and advertising space. It's also spreading its programs to cities like Philadelphia, Chicago, and even London. The program is entirely funded by advertising that the company sells on LinkNYC internet kiosks, so less densely-populated cities may be a tougher sell.

Chinese Scientists Develop Photonic Quantum Analog Computing Chip ( 55

hackingbear writes from a report via Xinhua: Chinese scientists demonstrated the first two-dimensional quantum walks of single photons in real spatial space, which may provide a powerful platform to boost analog quantum computing. Scientists at Shanghai Jiaotong University reported in a paper published in the journal Science Advances a three-dimensional photonic chip with a scale up to 49x49 nodes, by using a technique called femtosecond direct writing. Universal quantum computers, under develop by IBM, Google, Alibaba and other American and Chinese rivals, are far from being feasible before error correction and full connections between the increasing numbers of qubits could be realized. In contrast, analog quantum computers, or quantum simulators, can be built in a straightforward way to solve practical problems directly without error correction, and potentially be able to beat the computational power of classical computers in the near future.

AMD Integrates Ryzen PRO and Radeon Vega Graphics In Next-Gen APUs ( 75

The three biggest PC OEMs -- Dell, HP, and Lenovo -- are now offering AMD Ryzen PRO mobile and desktop accelerated processing units (APUs) with built-in Radeon Vega graphics in a variety of commercial systems. There are a total of seven new APUs -- three for the mobile space and four for the desktop. As AMD notes in its press release, the first desktops to ship with these latest chips include: the HP Elitedesk G4 and 285 Desktop, the Lenovo ThinkCentre M715, and the Dell Optiplex 5055. ZDNet's Adrian Kingsley-Hughes writes about what makes Ryzen PRO so appealing: Ryzen PRO has been built from the ground up to focus on three pillars -- power, security and reliability. Built-in security means integrated GuardMI technology, an AES 128-bit encryption engine, Windows 10 Enterprise Security support, and support for fTPM/TPM 2.0 Trusted Platform Module. One of the features of Ryzen PRO that AMD hopes will appeal to commercial users is the enterprise-grade reliability that the chips come backed with, everything from 18-moths of planned software availability, 24-months processor availability, a commercial-grade QA process, 36-moth warranty, and enterprise-class manageability.

There are no worries on the performance front either, with the Ryzen PRO with Vega Graphics being the world's fastest processor currently available for ultrathin commercial notebooks, with the AMD Ryzen 7 PRO 2700U offering up to 22 percent more productivity performance than Intel's 8th-generation Core i7-8550U in testing carried out by AMD. AMD has also designed the Ryzen PRO processors to be energy-efficient, enabling up to 16 hours of battery life in devices, or 10.5 hours of video playback. The Ryzen PRO with Vega Graphics desktop processors are also no slouches, opening up a significant performance gap when compared to Intel Core i5 8400 and Core i3 8100 parts.
AMD also announced that it is sampling its second-generation Threadripper 2900X, 2920X and 2950X products. "For Threadripper Gen2 you can expect a refresh of the current line-up; an 8-core Threadripper 2900X, a 12-core Threadripper 2920X and of course a 16-core Threadripper 2950X," reports "AMD will apply the same Zen+ tweaks to the processors; including memory latency optimizations and higher clock speeds."

AMD has something for the datacenter enthusiasts out there too. Epyc, AMD's x86 server processor line based on the company's Zen microarchitecture, has a new promo video, claiming more performance, more security features, and more value than Intel Xeon. The company plans to market Epyc in an aggressive head-to-head format similar to how T-Mobile campaigns against Verizon and AT&T. Given Intel Xeon's 99% market share, they sort of have to...

SpaceX Successfully Launches Satellite With New Upgraded 'Block 5' Falcon 9 Rocket ( 85

Thelasko shares a report from The Verge: This afternoon, SpaceX landed the most powerful version yet of its Falcon 9 rocket, after launching the vehicle from Cape Canaveral, Florida. The so-named Block 5 upgrade took off from the company's launchpad at Kennedy Space Center, sending a communications satellite into orbit for Bangladesh and then touched down on one of the company's drone ships in the Atlantic. It was the 25th successful rocket landing for SpaceX, and the 14th on one of the company's drone ships.

It also marks the first launch of the Block 5, the vehicle that will carry humans to space for NASA. The Block 5 is meant to be SpaceX's most reusable rocket yet, with many upgrades put in place that negate the need for extensive refurbishment between flights. In fact, the first Block 5 rockets will eventually be able to fly up to 10 times without the need for any maintenance after landings, SpaceX CEO Elon Musk said during a pre-launch press conference. Ideally, once one of these rocket lands, SpaceX will turn it horizontal, attach a new upper stage and nose cone on top, turn it vertical on the launchpad, fill it with propellant, and then launch it again. Musk noted that the vehicles would need some kind of moderate maintenance after the 10-flight mark, but it's possible that each rocket could fly up to 100 times in total.


Earth's 'Bigger, Older Cousin' Maybe Doesn't Even Exist ( 52

Ever since astronomers started to detect planets beyond our solar system, they've been trying to find another world just like Earth. And few years ago, they announced that they'd found a planet that was the closest match yet -- Kepler-452b. Trouble is, some astronomers now say it's not possible to know for sure that this planet actually exists. From a report: "There's new information that we can now quantify which tells us something that we didn't know before," says Fergal Mullally, who used to be an astronomer on the science team for NASA's Kepler Space Telescope. In 2015, NASA declared that Kepler-452b was the first near-Earth-sized planet orbiting in the "habitable" zone around a star very similar to our sun. The space agency called it Earth's "bigger, older cousin," and scientists were so enthusiastic that one began quoting poetry at a news conference. The original science wasn't shoddy, Mullally says. It's just that, since then, researchers have learned more about the telescope's imperfections.

AI Trained To Navigate Develops Brain-Like Location Tracking ( 40

An anonymous reader quotes a report from Ars Technica: Now that DeepMind has solved Go, the company is applying DeepMind to navigation. Navigation relies on knowing where you are in space relative to your surroundings and continually updating that knowledge as you move. DeepMind scientists trained neural networks to navigate like this in a square arena, mimicking the paths that foraging rats took as they explored the space. The networks got information about the rat's speed, head direction, distance from the walls, and other details. To researchers' surprise, the networks that learned to successfully navigate this space had developed a layer akin to grid cells. This was surprising because it is the exact same system that mammalian brains use to navigate. More DeepMind experiments showed that only the neural networks that developed layers that "resembled grid cells, exhibiting significant hexagonal periodicity (gridness)," could navigate more complicated environments than the initial square arena, like setups with multiple rooms. And only these networks could adjust their routes based on changes in the environment, recognizing and using shortcuts to get to preassigned goals after previously closed doors were opened to them. The study has been reported in the journal Science.

'Yes, Pluto Is a Planet' ( 301

schwit1 quotes a Washington Post perspective piece by the authors of a new book about Pluto: The process for redefining planet was deeply flawed and widely criticized even by those who accepted the outcome. At the 2006 IAU conference, which was held in Prague, the few scientists remaining at the very end of the week-long meeting (less than 4 percent of the world's astronomers and even a smaller percentage of the world's planetary scientists) ratified a hastily drawn definition that contains obvious flaws. For one thing, it defines a planet as an object orbiting around our sun -- thereby disqualifying the planets around other stars, ignoring the exoplanet revolution, and decreeing that essentially all the planets in the universe are not, in fact, planets.

Even within our solar system, the IAU scientists defined "planet" in a strange way, declaring that if an orbiting world has "cleared its zone," or thrown its weight around enough to eject all other nearby objects, it is a planet. Otherwise it is not. This criterion is imprecise and leaves many borderline cases, but what's worse is that they chose a definition that discounts the actual physical properties of a potential planet, electing instead to define "planet" in terms of the other objects that are -- or are not -- orbiting nearby. This leads to many bizarre and absurd conclusions. For example, it would mean that Earth was not a planet for its first 500 million years of history, because it orbited among a swarm of debris until that time, and also that if you took Earth today and moved it somewhere else, say out to the asteroid belt, it would cease being a planet.

To add insult to injury, they amended their convoluted definition with the vindictive and linguistically paradoxical statement that "a dwarf planet is not a planet." This seemingly served no purpose but to satisfy those motivated by a desire -- for whatever reason -- to ensure that Pluto was "demoted" by the new definition. By and large, astronomers ignore the new definition of "planet" every time they discuss all of the exciting discoveries of planets orbiting other stars.


One of the Milky Way's Fastest Stars Is an Invader From Another Galaxy ( 92

sciencehabit writes from a report via Science Magazine: On April 25, the European Space Agency released a data set gathered by the Gaia satellite containing the motions, and much more, of 1.3 billion stars. Astronomers have immediately sifted the data for fast-moving stars. They are prized as forensic tools: When rewound, their trajectories point back to the violent events that launched them. Last week, one team reported the discovery of three white dwarfs -- the dying embers of sunlike stars -- hurtling through the galaxy at thousands of kilometers per second, perhaps flung out from supernovae explosions. Another group reported more than two dozen fast-moving stars, some apparently kicked out by our galaxy's central black hole. And a third has confirmed that a star blazing through the outskirts of the Milky Way actually hails from another galaxy altogether, the Large Magellanic Cloud. The flood of discoveries has sent astronomers racing to their telescopes to check and classify the swift objects, says Harvard University astronomer James Guillochon. The findings have been reported in the journal Science.
United States

States Turn To an Unproven Method of Execution: Nitrogen Gas ( 646

States are reportedly turning to nitrogen gas to carry out the death penalty. "Oklahoma, Alabama and Mississippi have authorized nitrogen for executions and are developing protocols to use it, which represents a leap into the unknown," reports The New York Times. "There is no scientific data on executing people with nitrogen, leading some experts to question whether states, in trying to solve old problems, may create new ones." Slashdot reader schwit1 shares an excerpt from a report via The New York Times: What little is known about human death by nitrogen comes from industrial and medical accidents and its use in suicide. In accidents, when people have been exposed to high levels of nitrogen and little air in an enclosed space, they have died quickly. In some cases co-workers who rushed in to rescue them also collapsed and died. Nitrogen itself is not poisonous, but someone who inhales it, with no air, will pass out quickly, probably in less than a minute, and die soon after -- from lack of oxygen. The same is true of other physiologically inert gases, including helium and argon, which kill only by replacing oxygen.

Death from nitrogen is thought to be painless. It should prevent the condition that causes feelings of suffocation: the buildup of carbon dioxide from not being able to exhale. Humans are highly sensitive to carbon dioxide -- too much brings on the panicky feeling of not being able to breathe. Somewhat surprisingly, the lack of oxygen doesn't trigger that same reflex. Someone breathing pure nitrogen can still exhale carbon dioxide and therefore should not have the sensation of smothering.


Congress Is Quietly Nudging NASA To Look for Aliens ( 113

An anonymous reader shares a report: The search for extraterrestrial life, in general, has continued over the past decades, of course, carried out by academic institutions around the world, by people like Tarter, one of the field's best-known seti researchers (and the inspiration for Ellie Arroway, the protagonist in Contact, Carl Sagan's 1985 classic science-fiction novel). But they wouldn't get any help from the feds. "[Senator Bryan] made it clear to the administration that if they came back with seti in their budget again, it wouldn't be good for the NASA budget," Tarter says now. "So we instantly became the four-letter S-word that you couldn't say at headquarters anymore, and that has stuck for quite a while."

That could soon change. Lawmakers in the House of Representatives recently proposed legislation for NASA's future that includes some intriguing language. The space agency, the bill recommends, should spend $10 million on the "search for technosignatures, such as radio transmissions" per year, for the next two fiscal years. The House bill -- should it survive a vote in the House and passage in the Senate -- can only make recommendations for how agencies should use federal funding. But for seti researchers like Tarter, the fact that it even exists is thrilling. It's the first time congressional lawmakers have proposed using federal cash to fund seti in 25 years.


Are Two Spaces After a Period Better Than One? ( 391

Researchers at Skidmore College conducted an eye-tracking experiment with 60 Skidmore students and found that two spaces at the end of a period slightly improved the processing of text during reading. Ars Technica reports the findings: Previous cognitive science research has been divided on the issue. Some research has suggested closer spacing of the beginning of a new sentence may allow a reader to capture more characters in their parafoveal vision -- the area of the retina just outside the area of focus, or fovea -- and thus start processing the information sooner (though experimental evidence of that was not very strong). Other prior research has inferred that an extra space prevents lateral interference in processing text, making it easier for the reader to identify the word in focus. But no prior research found by [study authors] Johnson, Bui, and Schmitt actually measured reader performance with each typographic scheme.

First, they divided their group of 60 research subjects by way of a keyboard task -- the subjects typed text dictated to them into a computer and were sorted into "one-spacers" (39 regularly put a single space between sentences) and "two-spacers" (21 hit that space bar twice consistently after a period). Every student subject used but a single space after each comma. Having identified subjects' proclivities, the researchers then gave them 21 paragraphs to read (including one practice paragraph) on a computer screen and tracked their eye movement as they read using an Eyelink 1000 video-based eye tracking system. [...] The "one-spacers" were, as a group, slower readers across the board (by about 10 words per minute), and they showed statistically insignificant variation across all four spacing practices. And "two-spacers" saw a three-percent increase in reading speed for paragraphs in their own favored spacing scheme.
The controversial part of the study has to do with the 14 point Courier New font that the researchers presented to the students. "Courier New is a fixed-width font that resembles typewritten text -- used by hardly anyone for documents," reports Ars. "Even the APA suggests using 12 point Times Roman, a proportional-width font. Fixed-width fonts make a double-space more pronounced."

Orbits of Jupiter and Venus Affect Earth's Climate, Says Study ( 208

According to a new study published in the journal Proceedings of the National Academy of Sciences, gravitational tugs from the planets Jupiter and Venus gradually affect Earth's climate and life forms. The phenomenon occurs every 405,000 years and has been going on for at least 215 million years. USA Today reports: Jupiter and Venus are such strong influences because of their size and proximity. Venus is the nearest planet to us -- at its farthest, only about 162 million miles -- and roughly similar in mass. Jupiter is much farther away, but is the Solar System's largest planet. The study says that every 405,000 years, due to wobbles in our orbit caused by the gravitational pulls of the two planets, seasonal differences here on Earth become more intense. Summers are hotter and winters colder; dry times drier, wet times wetter. At the height of the cycle, more rain falls in the tropics, allowing lakes there to fill up. This compares to the other end of the cycle, when seasonal rains in the tropics "are less and lakes have much less of a tendency to become as full," [study lead author Dennis] Kent said. The results showed that the 405,000-year cycle is the most regular astronomical pattern linked to the Earth's annual turn around the sun, he said. Right now, we are in the middle of the cycle, as the most recent peak was around 200,000 years ago.

Edge Computing: Explained ( 159

An anonymous reader shares a report from The Verge, written by Paul Miller: In the beginning, there was One Big Computer. Then, in the Unix era, we learned how to connect to that computer using dumb (not a pejorative) terminals. Next we had personal computers, which was the first time regular people really owned the hardware that did the work. Right now, in 2018, we're firmly in the cloud computing era. Many of us still own personal computers, but we mostly use them to access centralized services like Dropbox, Gmail, Office 365, and Slack. Additionally, devices like Amazon Echo, Google Chromecast, and the Apple TV are powered by content and intelligence that's in the cloud -- as opposed to the DVD box set of Little House on the Prairie or CD-ROM copy of Encarta you might've enjoyed in the personal computing era. As centralized as this all sounds, the truly amazing thing about cloud computing is that a seriously large percentage of all companies in the world now rely on the infrastructure, hosting, machine learning, and compute power of a very select few cloud providers: Amazon, Microsoft, Google, and IBM.

The advent of edge computing as a buzzword you should perhaps pay attention to is the realization by these companies that there isn't much growth left in the cloud space. Almost everything that can be centralized has been centralized. Most of the new opportunities for the "cloud" lie at the "edge." The word edge in this context means literal geographic distribution. Edge computing is computing that's done at or near the source of the data, instead of relying on the cloud at one of a dozen data centers to do all the work. It doesn't mean the cloud will disappear. It means the cloud is coming to you.
Miller goes on to "examine what people mean practically when they extoll edge computing," focusing on latency, privacy and security, and bandwidth.

Apple's iMac Turns 20 Years Old ( 127

Twenty years ago on May 6, 1998, Steve Jobs unveiled the iMac for the first time. Current CEO Tim Cook shared footage from the event on Twitter Sunday. It shows Jobs describing the $1,299 iMac as an impossibly futuristic device. CNNMoney reports: "The whole thing is translucent, you can see into it. It's so cool," Jobs gushes. He points to a handle that allows the computer's owner to easily lift the device, which is about the size of a modern microwave oven. He takes a jab at the competition: "The back of this thing looks better than the front of the other guy's, by the way." In January 1999, less than a year after the iMac's debut, Apple more than tripled its quarterly profit.

The San Francisco Chronicle declared Apple was "cashing in on insatiable demand for its new space-age iMac computer." For the next decade, Jobs kept the new "i" products coming. Today, the iMac is in its seventh generation and is virtually unrecognizable from its ancestor. An Apple spokesperson notes an "iMac today consumes up to 96% less energy in sleep mode than the first generation."
Some of the original iMac's tech specs include: PowerPC G3 processor clocked at 233MHz, 15-inch display with 1,024x768 resolution, two USB ports and Ethernet with a built-in software modem, 4GB hard drive, 32MB of RAM (expandable to 128MB), 24x CD-ROM drive, built-in stereo speakers with SRS sound, Apple-designed USB keyboard and mouse, and Mac OS 8.1.

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