Retrocomputing by hobbyists

Of these form of retrocomputing occurs as recreation or hobby, which is often misunderstood by non-enthusiasts, since it involves the mixture of nostalgia and horror (about items rather JCL). It typically involves maintaining or even emulating obsolete hardware.

Historical retrocomputing

The further good line of retrocomputing is section of the history of computing. It may be seen when a parallel of experimental archaeology in computing.

A bit of notable examples include:

Reconstruction of Babbage's Difference engine (more than the century when its project) A implementation of Plankalkül in 2000 (more than half a century since its inception).