That first one sounds like it may have a little "Whiter Shade of Pale" in it - and the Beatles were certainly an influence on Procol Harum. The track itself is clearly rooted in 1990s Trance, which itself arose through the late 1980s Rave scene - both are audible in all 4 tracks.
These tracks are all created using the same very simple methods - loops created or uploaded and manipulated (copied and pasted) in order to create a flowing piece in a style that builds to climaxes rather than focusses on verse/chorus bridge structures. It's easy peasy, which is why there are so many tunes in this vein.
The sequencing methods used are exactly those used in TMK, even if the hard work is now done by a computer.
Given that 43 years have elapsed since TMK, you'd expect the music to have evolved a bit - but essentially, it hasn't, which is why TMK still sounds fresh in its own way, and the 1980s pieces sound terribly dated, while the 1990s pieces sound of their time.
None of these are strictly what I'd call electronica though - there are too many samples of people playing instruments, and not enough electronically manipulated sounds. Subtle but important difference I feel.
Now Autechre are electronica...
