• H Hexadecimal
• HALs Hardware Abstraction Layers
• HCI Human-Computer Interaction
• HCSS High Capacity Storage System
• HDLC High-level Data Link Control
• HDTV High-Definition TeleVision
• HFC Hybrid Fiber Coax
• hhos ha ha only serious
• HLLAPI High Level Language Applications Programming Interface
• HMA High Memory Area
• HMD Head-Mounted Display
• HMOS High-speed Metal Oxide Semiconductor
• HP Hewlett-Packard
• HPCA High Performance Computing Act
• HPCC High Performance Computing and Communication
• HPFS High-Performance File System
• HPPCL Hewlett-Packard Printer Command Language
• HPPI High Performance Parallel Interface
• HS High Speed
• HSM Hierarchical Storage Management
• HSV Hue Saturation and Value
• HTML HyperText Markup Language
• HTTP HyperText Transfer Protocol
• HYTELNET HYpertext Browser for TELNET-accessible sites
• Hz Herz