<> 1

Hardware platform

Code to identify the type of hardware installed in a computer environment e.g. PC, Mac, UNIX-Workstation, Mini, Mainframe.

<> 2

Operating system

Code to identify the operating system, like DOS, VMS, etc. used in a computer environment.

<> 3

Application software

Code to identify an application software, like AutoCad, WinWord, etc. used in a computer environment.

<> 4

Network

Code to identify a network like Ethernet, Token Ring, etc. implemented in a computer environment.

<> 5

Sending system

Code to identify the system, which acts as a sending system in an interchange.

<> 6

File generating software

Software used to generate a file.

<> 7

File compression software

Software used for the compression of a file.

<> 8

File compression method

Method used for the compression of a file.