PDP-9 was the approximately twice speed of the PDP-7
The PDP-9 produced by Digital Equipment Corporation, helped sell another 40 units was the approximately twice speed of the PDP-7 was built using discrete transistors. The 18-bit PDP systems preceding the PDP-9, PDP-1, PDP-7 and PDP-4. PDP-9 front panel PDP-9 System Console was the PDP-1, a computer with an 18-bit word length. The demonstration model included a built-in graphical CRT display in the console. A basically similar front panel was used on a relatively little-known machine.
Assembly language is a low-level programming language