PDP-8/I
The PDP-8 is a series of 12-bit minicomputers introduced by DEC in 1966. The PDP-8/I is the second model, and dates from 1968.

Manufacturer Digital Equipment Corporation
Model PDP-8/I
Classification Minicomputer
Introduced 1968
Word Size 12 bits
Implementation TTL ICs - M Series Flip Chip modules.
Registers 2 (AC, Multiplier Quotient)
Logical Address 12 bits
Physical Address 15 (3 bit field + 12 bit address)
Memory Type Ferrite Core