The following terms starting with the letter "H" have specific pages dedicated to them. You can come back to this page or the main Computer Terms page by using the navigation breadcrumbs at the bottom of each page.

• HAL = Hardware Abstraction Layer
• HD = High Density
• HDD = Hard Disk Drive
• HDLC = High-level Data Link Control
• HDML = Handheld Device Markup Language
• HDR = High Data Rate
• HDTV = High-Definition Television
• HFS = Hierarchical Filing System
• HMA = High Memory Area
• HMD = Head-Mounted Display
• HP = Hewlett-Packard
• HP-GL = Hewlett-Packard Graphics Language
• HPAS = Hypermedia Presentation and Authoring System
• HPFS = High Performance File System
• HSL = Hypermedia Synchronization Language
• HSM = Hierarchical Storage Management
• HTML = Hypertext Markup Language
• HTTP = Hypertext Transfer Protocol
• HTTPD = Hypertext Transfer Protocol Daemon (Server)