hexidecimal hexit HFC HHCP HHOJ HHOK HHOS HIBOL HID hidden flag Hierarchical Data Format hierarchical database hierarchical file system Hierarchical Music Specification Language hierarchical navigation
| hierarchical routing hierarchy high bit High bit-rate Digital Subscriber Line high colour high density high memory area high moby High Performance Computing and Communications High Performance File System High Performance Fortran High Performance Parallel Interface High Performance Routing High Performance Serial Bus High Speed Circuit Switched Data
| High Speed Connect high speed serial interface High Voltage Differential High-level Data Link Control high-level language High-speed Net Connect Higher Education National Software Archive higher-order function higher-order macro HIGZ hill climbing HiLog HIMEM hing HINT
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