Both the Mini 12 and the Data 12 were compatible with the DEC PDP-8E minicomputer, and the Data 12’s operating system was based on DEC’s OS-8.
TLF Mini 12 (1974, early micro)
Base Configuration: 8K RAM (32K max), Extended BASIC
Important Options: FORTRAN, Algol
TLF Data 12 (1977, early micro)
Original Retail Price: $1,695
Base Configuration: 4MHz IM6100, proprietary tape operating system, 4K RAM (32K max), digital tape drive, serial interface, BASIC, Algol
Important Options: display and ASCII terminals