Probably in the 1990s when they moved operational systems from timeshare/unix/et...

rdl on June 17, 2013 | parent | context | favorite | on: NSA veterans speak out on whistle-blower [video]

Probably in the 1990s when they moved operational systems from timeshare/unix/etc. multiuser to a bunch of networked Windows desktops for all use, not just office automation (which is how they brought them in originally).