aarondubrow writes: "A chance investigation in Guatemala City in 2005 led to the discovery of nearly 80 million pages of police records dating from 1882 to 1996 documenting human rights abuses. The Guatemalan researchers partnered with The University of Texas at Austin and the Texas Advanced Computing Center to make the Archive available online. The Ranger supercomputer was used to create reference files for the first 10 million documents in just a few days. By speeding up the process, UT and the AHPN researchers were able to get the archive online in time for the Guatemalan elections."
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals