Executable file

A file containing program instructions, as opposed to data created with an application program. An executable file has the extension .BAT, .COM, or .EXE.

Execution speed

The speed at which the central processing unit can execute commands. Also called operating speed. The Apex can run at

4.77MHz or 10 MHz.

Extended partition

An additional MS-DOS partition; you can create one primary MS-DOS partition and one extended partition.

Extension

A suffix of up to three characters that can be added to a file name to better identify it.

External command

An MS-DOS command stored in a program file with the extension .COM or .EXE. MS-DOSmust be able to find the program file to execute the command. See also Internal command.

File

A group of related pieces of information called records, or entries, stored together on a disk. Text files consist of words and sentences. Program files consist of codes and are used by computers to interpret and carry out instructions.

Filename

A name of up to eight characters that MS-DOS uses to identify a file.

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