Internet Terminology

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Zend Framework
Zend Framework or ZF is an open source object-oriented Web application framework implemented in PHP 5. The goal of ZF is to simplify Web development while maintaining object-oriented best practices for building Web 2.0 applications and Web services.

Zettabyte
A zettabyte is 2 to the 70th power, or 1,180,591,620,717,411,303,424 bytes. It can be estimated as 10 to the 21st power, or 1,000,000,000,000,000,000,000 bytes. A zettabyte is 1,024 exabytes and precedes the yottabyte unit of measurement. Because of the enormous size of a zettabyte, this unit is almost never used.

ZIF
is short for "Zero Insertion Force." ZIF is a type of CPU socket on a computer motherboard that allows for the simple replacement or upgrade of the processor. Processors that use a ZIF socket can easily be removed by pulling a small release lever next to the processor and lifting it out. The replacement processor is then placed in the socket and secured by pushing the lever in the opposite direction.

Zip
a compressed file. "Zipping" a file involves compressing one or more items into a smaller archive file. A zipped file takes up less hard drive space and takes less time to transfer to another computer. In order to use a zipped file you will need to unzip or open the file first. PKZIP for DOS or WinZip for Windows are two popular programs that can unzip files. Macintosh files are most often "stuffed" into Stuffit files (.sit), which can be "unstuffed" using Aladdin's Stuffit Expander.

Zip Drive
a small, portable disk drive used primarily for backing up and archiving personal computer files. The trademarked Zip drive was developed and is sold by Iomega Corporation. Zip drives and disks come in two sizes. The 100 megabyte size actually holds 100,431,872 bytes of data or the equivalent of 70 floppy diskettes. There is also a 250 megabyte drive and disk. The Iomega Zip drive comes with a software utility that lets you copy the entire contents of your hard drive to one or more Zip disks.

Zmodem Protocol
an error-correcting protocol for modem. Modems that agree on using the Zmodem protocol send data in 512-byte blocks. If a block arrives and an error is detected, a "NAK" (negative acknowledgement) is returned and the block is resent.



Zone File
is a plain text file that is stored on a name server and provides information about one or more domain names. Each zone file contains a list of DNS records with mappings between domain names and IP addresses. These records define the IP address of a domain name, the reverse lookup of an IP to other domains, and contain DNS and mail server information.

Zoom Box
a small square in the upper right corner of a window which, when clicked, will expand or maximize the window to fill the whole screen. Many applications provide a zoom feature which enlarges the view of an object enabling you to see the object in more detail.

ZOS
refers to IBM's mainframe operating system. z/OS is a 64-bit operating system that supports Java, UNIX, API's, and TCP/IP features. IBM's first mainframe operating system was MVS (Multiple Virtual Storage), which was succeeded by OS/390 and then z/OS.

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