Released in March 1997 to mark Apple's 20th year in business rather than the anniversary of the Mac, the "20th Anniversary Macintosh," or TAM as it became known, might look odd by today's standards, but it was a unique machine in its own right. 

Its strikingly thin and upright "all-in-one" design housed several novel features, including a built-in 12.1-inch LCD flat-screen display, vertically mounted CD-ROM and floppy drives, and an integrated TV/FM tuner. The TAM ran a modified version of Mac OS 7.6.1 to control these features, while a 250MHz PowerPC 603e CPU and 64MB of RAM ensured performance was nothing to sniff at. It even had a custom Bose sound system with two accompanying speakers and a subwoofer built into the external power supply.

OTHER INFO: Although officially produced in celebration of the Twentieth Anniversary of Apple, the 20th Anniversary Mac was released close to a year after the fact, in late Spring, 1997. And a truly unique Mac it was. The Motherboard was similar to that of the PowerMac 5500, and it was based on the same 603e processor, running at 250 MHz. The real innovation of the 20th Anniversary Mac was its unique shape, and advanced sound and video features. It came with an integrated TV/FM Radio System, an S-Video Input, and a custom sound system designed by Bose, with integrated stereo speakers, and a separate sub-woofer. The Twentieth Anniversary Mac was a limited edition, and sold for nearly $10,000. Its price was cut to as low as $1,999 and it was discontinued in March 1998.