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

Data I/O 326-0324-029 3900 Program Algorithm Set 6, 7, 8 V5.90 Floppy Software

Data I/O 326-0324-029 3900 Program Boot/Files Alg. Set 1 V5.90 Floppy Software

Data I/O 3900 Programming System User Manual

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

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

Data I/O 326-0487-015 3980/3900 Program Device List V5.90 Family/Pinout Software

Data I/O 326-0324-030 3900/3980 Programming Algorithm Sets 4 & 5 V6 Software