Those examples and companies, IBM (the IBM 360) and Apple (the Macintosh), were picked by the parent post.
DEC was acquired by Compaq not HP. Compaq was later acquired by HP but before that happened Compaq sold the Alpha line to Intel because it would have competed with the Itanium. The Alpha was then licensed by Intel to the Chinese (according to Gustafson) and was used as the basis for the Sunway Taihu Light.