HP (Hewlett-Packard) is a server and network equipment manufacturer. This is a generic tag to be used when discussing HP hardware or software with no more specific tag available - See the list in the main tag wiki.
HP (Hewlett-Packard) is an American company encompassing multiple brands and product lines, including servers, network equipment, storage equipment, workstations, components, and consumer electronics.
HP has acquired several major industry names in computing, including Compaq and 3Com.
Wherever possible a more specific tag should be used. For example: