Bookshelf (1987) 11 Reference MacOS

Microsoft Bookshelf is a CD-ROM based multimedia reference tool from Microsoft, including a dictionary, thesaurus, quotations, atlas, and other types of references. Some versions were included and integrated with Microsoft Office, albeit sometimes stripped down.

• 96-97

Microsoft Outlook (1997) 7 Communications PIM Windows MacOS

Microsoft Outlook (not to be confused with Outlook Express) is an enterprise grade e-mail client. It is primarily intended for use with Microsoft Exchange Server. It was available as both a stand-alone product and as part of Microsoft Office.

• 97

Sidekick (1984) 15 Utility PIM OS2

Borland Sidekick is a DOS based PIM (Personal Information Manager) and one of the first widely-used TSR (terminate and stay resident) programs. The key feature of Sidekick was that one could use Sidekick's utilities while using most other MS-DOS applications. This was important because MS-DOS had no built-in multi-tasking or task switching capabilities.

• 1.0 for OS/2