It was not until the return of Steve Jobs in 1997 that Keychain concept was revived from the now-discontinued PowerTalk. By this point in time the concept was no longer so unusual, but it was still rare to see a keychain system that was not associated with a particular piece of application software, typically a web browser. Keychain was later made a standard part of Mac OS 9, and was included in Mac OS X in the first commercial versions.