||This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. (October 2009)|
|Floating point precision|
|Floating point decimal precision|
In computer architecture, 18-bit integers, memory addresses, or other data units are those that are at most 18 bits (2.25 octets) wide. Also, 18-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size.
Example 18-bit computer architectures
- Possibly the most well-known 18-bit computer architectures are the PDP-1, PDP-4, PDP-7, PDP-9 and PDP-15 minicomputers produced by Digital Equipment Corporation from 1960 to 1975.
- UNIVAC produced a number of 18-bit computers, including the UNIVAC 418 and several military systems.
- The IBM 7700 Data Acquisition System was an 18-bit computer.
- The BCL Molecular
- The NASA Standard Spacecraft Computer NSSC-1
- DIGITAL Computing Timelime: 18-bit architecture
- Architectural Evolution in DEC’s 18b Computers, Bob Supnik, 2006.