A Programmer's Introduction to IBM system/360 Assembler Language. IBM manual.

1968 IBM System 360 Reference Library & 1969 Technical Newsletter

Vintage 1982 Digital Research CP/M Operating System Manual First Printing

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The BUG Book VI

Vintage IBM 7090/7094 Op System Gen. Sorting 1965

TRANSEC UNLOCK MASTERKEY Computer Manual & disks

Rare! Heathkit Z-100 Technical Manual: BOOT ROM Source Listings 1983 Employee