# Word (computer architecture)

Natural unit of data used by a particular processor design.

- Word (computer architecture)245 related topics

## Integer (computer science)

Integer is a datum of integral data type, a data type that represents some range of mathematical integers.

Integer is a datum of integral data type, a data type that represents some range of mathematical integers.

Computer hardware nearly always provides a way to represent a processor register or memory address as an integer.

## Computer architecture

Set of rules and methods that describe the functionality, organization, and implementation of computer systems.

Set of rules and methods that describe the functionality, organization, and implementation of computer systems.

Instruction set architecture (ISA): defines the machine code that a processor reads and acts upon as well as the word size, memory address modes, processor registers, and data type.

## Computer memory

Device or system that is used to store information for immediate use in a computer or related computer hardware and digital electronic devices.

Device or system that is used to store information for immediate use in a computer or related computer hardware and digital electronic devices.

The memory cells are grouped into words of fixed word length, for example, 1, 2, 4, 8, 16, 32, 64 or 128 bits.

## Byte

Unit of digital information that most commonly consists of eight bits.

Unit of digital information that most commonly consists of eight bits.

These systems often had memory words of 12, 18, 24, 30, 36, 48, or 60 bits, corresponding to 2, 3, 4, 5, 6, 8, or 10 six-bit bytes.

## Memory address

Reference to a specific memory location used at various levels by software and hardware.

Reference to a specific memory location used at various levels by software and hardware.

There exist word-addressable computers, where the minimal addressable storage unit is exactly the processor's word.

## PDP-10

Mainframe computer family manufactured beginning in 1966 and discontinued in 1983.

Mainframe computer family manufactured beginning in 1966 and discontinued in 1983.

The PDP-10's architecture is almost identical to that of DEC's earlier PDP-6, sharing the same 36-bit word length and slightly extending the instruction set (but with improved hardware implementation).

## Bitwise operation

In computer programming, a bitwise operation operates on a bit string, a bit array or a binary numeral (considered as a bit string) at the level of its individual bits.

In computer programming, a bitwise operation operates on a bit string, a bit array or a binary numeral (considered as a bit string) at the level of its individual bits.

If the set of bit strings of fixed length n (i.e. machine words) is thought of as an n-dimensional vector space ]], then vector addition corresponds to the bitwise XOR.

## PDP-11

Series of 16-bit minicomputers sold by Digital Equipment Corporation from 1970 into the 1990s, one of a set of products in the Programmed Data Processor (PDP) series.

Series of 16-bit minicomputers sold by Digital Equipment Corporation from 1970 into the 1990s, one of a set of products in the Programmed Data Processor (PDP) series.

During this period, the computer market was moving from computer word lengths based on units of 6 bits to units of 8 bits, following the introduction of the 7-bit ASCII standard.

## Floating-point arithmetic

Arithmetic using formulaic representation of real numbers as an approximation to support a trade-off between range and precision.

Arithmetic using formulaic representation of real numbers as an approximation to support a trade-off between range and precision.

Floating-point compatibility across multiple computing systems was in desperate need of standardization by the early 1980s, leading to the creation of the IEEE 754 standard once the 32-bit (or 64-bit) word had become commonplace.

## Bus (computing)

Communication system that transfers data between components inside a computer, or between computers.

Communication system that transfers data between components inside a computer, or between computers.

Buses can be parallel buses, which carry data words in parallel on multiple wires, or serial buses, which carry data in bit-serial form.