Mac OS 8.0 was released in July 26, 1997. Improvements in Mac OS 8.0 include a multi-threaded Finder, the three-dimensional Platinum appearance theme and a number of performance related improvements to virtual memory, AppleScript execution times and system start-up times. Help was available in the form of an Info Centre (by means of web pages stored on the user's hard drive, with links to the Internet -- this was new with Mac OS 8), as well as Balloon Help and Apple Guide.