HACKERS- People who are interested in, and know a lot about computers.

HAM- Hold And Modify. This enables your Amiga to display more colours. On OCS/ECS machines it showed 4096 colours whilst AGA machines such as the A1200, CD³² and A4000 used the more advanced HAM8 to show 256,000 colours at once.

HAM8- An advanced version of HAM (above) for the AGA chipset. Allows 256,000 colours to be shown on screen at once from a palette of 16.8 million.

HANDLER- The software that allows AmigaOS to access various file systems, such as reading PC and Mac disk.

HANDSHAKING- A protocol that is used to communicate between devices, using extra controls (RTS/CTS system) or special characters (XON/XOFF).

HANG- When your computer freezes, forcing you to reboot.

HARD DRIVE- A large disk that stores information usually inside the computer.

HELP BU|TTON- The help key on the Amiga keyboard is underused. Some programs use it to launch online manuals.

HEXADECIMAL- Also known as Base16. Base 16 numbers go from 1-9 and then 9-A, up to 1F, and then 20.

HFS- Hierarchical Filing System. Apple's custom CD-ROM filing system.

HIDDEN FLAGS- Also known as protection bits. These are used to attach atrributes to a file, such as making it undeletable.

HIGHCOLOUR- A graphics resolution that allows thousands of colours to be displayed at once.

HIGH MEMORY- The area of memory on the PC between 640K of conventional ram and 1MB.

HIGH RESOLUTION- An Amiga mode used to display the most pixels on a TV based system. It displays a total of 640 pixels horizontally on a screen.

HOST- A term used in AREXX programming. A Host is the program used to execute a particular command, such as a paint package to batch convert a sequence of images.

HOST SPOT- The tip of the mouse pointer onscreen is the hot spot. It is the part where pointer is acting.

HOT KEY- A key combination that is used to open a Commodity window.

HSF- High Sierra Format. The original CD-ROM format named after the hotel where the standard was discussed. It later evolved into ISO9660.

HTML- Hyper Text Markup Language. A language used to create web pages, similar to AmigaGuide.

HTTP- HyperText Transfer Protocol. Used on the internet.

HYBRID MEMORY- Many A500 expansion featured memory that could not be accessed by the chipset but is slow enough to make you think it is. Also known as Slow Fast memory. For some reason the Amiga emulator, UAE calls it BOGO RAM.

HYPERBOOK- An early example of multimedia creation application. Ahead of its time.

HYPERTEXT- Invented in the 1960's by Ted Nelson to describe information being linked together in a document in a series of buttons.

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