pnx2.1.6.dmk  622034-00 #PNX 2.1.6
              PNX 2.0 NON SOURCE
              Copyright (C) International Computers Limited, 1984
              single density, double sided
              Contents: PERQ 1 4K BOOT
pnx2.2.6.dmk  622044-00 #PNX 2.2.6
              Contents: PERQ 1 16K BOOT
pnx2.3.6.dmk  622054-00 #PNX 2.3.6
              Contents: PERQ 2 16K BOOT
pnx2.4.5.dmk  622064-00 #PNX 2.4.5
              Contents: FULL KERNEL & WINDOW MANAGER
pnx2.5.4.dmk  622074-00 #PNX 2.5.4
              Contents: C COMPILER
pnx2.6.3.dmk  622084-00 #PNX 2.6.3
              Contents: UTILITIES 1
pnx2.7.3.dmk  622094-00 #PNX 2.7.3
              Contents: UTILITIES 2
pnx2.8.5.dmk  622104-00 #PNX 2.8.5
              Contents: UTILITIES 3
pnx2.9.4.dmk  622114-00 #PNX 2.9.4
              Contents: UTILITIES 4 
pnx2.10.5.dmk 622124-00 #PNX 2.10.5
              Contents: UTILITIES 5