[pjmlp]

IBM did not create anything, Compaq took it away from them and IBM failed to regain control.

There would be no open PC clones if IBM had succeed suing the clone makers or if PS/2 MCA architecture had actually worked out.

[mixmastamyk]

They did assemble a standard from off the shelf parts. Few things are built from first principles since the scientific revolution.

[pjmlp]

Without Compaq reverse engineering the BIOS and doing it in such a way that IBM could not release their lawyers on them, there would not be an open PC, regardless where those parts came from.

We would all be using variants of Atari, Amiga, Mac, Archimedes by now instead.

Which ironically is what laptops, 2-1 and mobile platforms have become.