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 4 & 5 V6 Software

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

Data I/O 3900 Programming System User Manual

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

Data I/O 326-0324-023 3900 Programming System ALG Set 2, Disk 1/3 Software

Data I/O 326-0324-024 3900 Prog. System Disk 1 of 3 ALG Set 2 Software

Data I/O 326-0324-029 3900 Program Algorithm Set 2 &3 V5.90 Floppy Software