Data I/O 326-0324-030 3900/3980 Program Boot/Files Algorithm Set 6-8 V6 Software

Data I/O 326-0324-030 3900/3980 Programming Algorithm Sets 2 & 3 V6 Software

Data I/O 326-0324-034 3900/3980 Prog. System (ALG Sets 4, 5) Disk 3/5 Software

Data I/O 3900 Programming System User Manual

Data I/O 0326-0324-034 3900/3980 Programming Syst. (ALG Set 6) Disk 4/5 Software

Data I/O 326-0324-034 3900/3980 Prog. System (ALG Sets 2, 3) Disk 2 of 5

Data I/O 0326-0324-034 3900/3980 Prog. System Disk 5 (ALG Sets 7, 8) Software

Data I/O 326-0324-029 3900 Program Algorithm Set 4 & 5 V5.90 Floppy Software