Microsoft was left out because when it was first coined, Microsoft seemed to be heading down the IBM path of giving up on innovative technology and just becoming a beige box company for enterprise. They've since turned that around substantially, but the acronym has stuck.
Microsoft was left out because when it was first coined, Microsoft seemed to be heading down the IBM path of giving up on innovative technology and just becoming a beige box company for enterprise. They've since turned that around substantially, but the acronym has stuck.