What is .ISM file extension?
Project file created by InstallShield, a program used to create Windows installers; contains all project settings and code, including directory structures, file names, custom scripts, and installer dialog settings; used to build an installation package.
ISM files can be saved in either a binary format or an XML format.
NOTE: ISM files are created by the Premiere and Professional editions of InstallShield.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.