zip (.zip)
File name extension for files compressed or compacted with WINZIP / PKZIP or other programs.

ZMODEM
A transfer protocol. It's the faster of XMODEM, YMODEM, and ZMODEM and is the most popular as well.

Zone
A section of the total domain name space that is represented by the data stored on a particular name server. The name server has authority over that particular zone - or the particular section of the domain name space - described by that data.

Zone Files
A file on a nameserver that designates a domain name with all of its associated subdomains, IP addresses, and mail server. Parts of the zone file include the A record, CNAME, and MX records. A zone file is also called a "DNS table".

Zone Transfer
A special type of query that asks a name server for the entire contents of a Zone. Cached records are never reported in a zone transfer. Zone transfers are usually used by secondary servers to update its own zone data from its primary server.

Zope
Zope is an open source web application server written in Python. Plone uses Zope.