January marks an important month for Apple, and consequently for computer history as well.

The third Mac, the Macintosh Plus was released on 16 January 1986 at an introductory price of 2599 US dollars. In many aspects it was a machine with significant innovations: it was the first Mac model that contained an SCSI port that allowed users to connect external devices (tape drives, hard disk, etc.), and the first machine to run the System 7 OS.

19 January is a day when no fewer than three Apple models were introduced though in different years: Lisa (1983), Macintosh 128K (1984), and Macintosh SE/30 (1989).

Lisa was the advanced version of earlier Macintosh projects, and the final version (Lisa 2/10) was modified and even renamed to be sold as Macintosh XL. Steve Jobs worked on Lisa until 1982, when he joined the Macintosh team due internal conflicts. Today working Lisa models are extremely rare, existing machines are collectors’ pride.

The 128K was the first and original Macintosh that was introduced as Apple Macintosh. It was followed by 512K, and renamed 128K subsequently to distinguish between the two machines. The 128K was sold at a price of 2495 US dollars, production was discontinued in October 1985.

Macintosh SE/30, the fastest and most expandable version of the original black and white compact series, was sold in shops between 1989 and 1991. This model even appeared in the Emmy and Golden Globe winner Seinfeld, an American situation comedy series on NBC between 1989 and 1998: the main character, Jerry had one on his desk for a couple of seasons.