[FraKtus]

Is it only my bad memory or some of the dates are wrong:

Tinker 1981, showing a color Macintosh interface.

ProGraph 1983, also using an interface using colors.

Pecan 1984, the year the first Macintosh was released.

[Narishma]

I think they just picked random screenshots. For example they show Visual Basic with a Windows 95 interface but it predates it by several years.

[jonathanedwards]

Yeah, the dates are an approximation of when it was developed, but many screenshots come from much later, especially for pre-web tools.