Cell

The term cell is used in various fields: in biology and in high-tech.

Biology

A cell is the basic unit of all organisms (except viruses). The cell membrane separates it from the exterior in the case of single-cell organisms, and from other cells in the case of multi-cellular organisms, making the cell an entity.

The cell contains the genome (DNA), organelles (such as the endoplasmic reticulum, chloroplasts etc.) and many more or less organised biological molecules.

High-tech

In ATM (asynchronous transfer mode), a cell is a standardised mini-packet containing 48 bytes of data and 5 bytes of address. ATM switches

In radio-communications, an area is divided into a network of cells which are assigned a set of frequencies that are non-reusable in adjacent cells.