1. Computing

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Hard Disk

Hard Disk Drive

Hard Drive

Hard Drive Activity Light

Hardware

Hardware Compatibility List

HCL
Hardware Compatibility List

Hardware Error Code

Help (Command Prompt Command)

HDD
Hard Disk Drive

Help (Recovery Console Command)

HDD LED

Help Switch
The help switch (/?) is used to produce more information about the command with which it's used.

Hexadecimal

HMG IS5
The HMG IS5 data sanitization method is a software-based data wiping standard originally defined by the Communications-Electronics Security Group in the UK.

Hop

Hive

Hidden File

HKCU
HKEY_CURRENT_USER

HKEY_CURRENT_USER

Hotfix

HKEY_LOCAL_MACHINE

Hex

HKLM
HKEY_LOCAL_MACHINE

HKEY_CURRENT_CONFIG
HKEY_CURRENT_CONFIG

HKEY_CURRENT_CONFIG

Hostname

Housing
The case is the usually plastic or metal housing that contains the computer's main parts such as the motherboard, hard drive, etc.

HKU
HKEY_USERS

HKEY_USERS

HKCR
HKEY_CLASSES_ROOT

HKEY_CLASSES_ROOT

Hash

Hash Function

HTTP Status Code

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