[1] It was part of the IBM 700/7000 series, and was based on discrete transistors rather than the vacuum tubes of the 1950s.

[3] The 7070 was not designed to be compatible with the 650 instruction set, as the latter had a second jump address in every instruction to allow optimal use of the drum, something unnecessary and wasteful in a computer with random-access core memory.

The 7070 series stored data in words containing 10 decimal digits plus a sign.

The machine shipped with 5,000 or 9,990 words of core memory[4] and the CPU speed was about 27KIPS.

[citation needed] A typical system was leased for $17,400 per month or could be purchased for $813,000.

It has a single address space for registers and core storage.

The 7070 was implemented using both CTDL[7] (in the logic and control sections)[8]: 167  and current-mode logic[9] (in the timing storage and core storage sections) on Standard Modular System (SMS) cards.

The channels run asynchronously to the processor and generate priority interrupts upon completion of an operation.

Completion of a transfer between the device and the buffer generates a priority interrupt.

Transfers between the buffer and core storage delay the processor until completion.

The IBM 7300 Disk Storage Unit has a capacity of 6 million digits.

Like the 729 II and IV, the 7330 supports dual (200 BPI/556 BPI) density.

The installation must wire a plugboard to control the layout of the print line.