Installation of a program

Computer program

A computer program is a sequence of instructions written to perform a specified task with a computer. A computer requires programs to function, typically executing the program's instructions in a central processor. The program has an executable form that the computer can use directly to execute...

 (including driver

Device driver

In computing, a device driver or software driver is a computer program allowing higher-level computer programs to interact with a hardware device....

s, plugins, etc.) is the act of putting the program onto a computer system so that it can be executed.

Because the requisite process varies for each program and each computer, many programs (including operating system

Operating system

An operating system is a set of programs that manage computer hardware resources and provide common services for application software. The operating system is the most important type of system software in a computer system...

s) come with a general-purpose or dedicated installation program called an installer–a specialized program which automates most of the work required for their installation.
Some software can be executed by simply copying it to a computer and executing it with no further ado; no installation procedure as such is required.