Installer is a scripting language developed by Sylvan Technical Arts and published by Commodore International for AmigaOS, first released for version 2.1 in 1992.^[1] Its grammar is based on the LISP programming language. A compatible re-implementation named InstallerLG is actively developed as of October 2018.^[2]

Example from the developer guide:

(makedir "T:fred"
	(prompt "I will now create the directory \"T:Fred\"")
	(help @makedir-help)
	(infos)
	(confirm)
)

The InstallerGen tool can be used as an alternative for writing scripts by hand.^[3]