xmlns:atom="http://www.w3.org/2005/Atom" xmlns:atom="http://www.w3.org/2005/Atom"

[F1ANNEX IU.K.

CATEGORY 4 — COMPUTERSU.K.

Note 2:Control units which directly interconnect the buses or channels of central processing units, ‘main storage’ or disk controllers are not regarded as telecommunications equipment described in Category 5, Part 1 (Telecommunications).U.K.

Technical Note:U.K.

‘Main storage’ is the primary storage for data or instructions for rapid access by a central processing unit. It consists of the internal storage of a "digital computer" and any hierarchical extension thereto, such as cache storage or non-sequentially accessed extended storage.]