B1 Public Domain Software
B2 CP/M 1.3 Persci 16K SOL System  Serial 17-48
B3 Backup Copy Distribution Disk CP/M 1.3
B4 BASIC E K.2 Sol System 32K system serial 17-48
B5 Backup copy BASIC E
B6 Backup copy CP/M 1.3 Cbasic
B7 Intel MDS, Isis II
B8 Copy of Pilot Source ISIS Format
B9 Micromation
B10 2.2 8080