Online documentation. Many programs come with the instruction manual, or a portion of the manual, integrated into the program. If you encounter a problem or forget a command while running the program, you can summon the documentation by pressing a designated Help key or entering a HELP command. In Windows, the Help key is the function key labeled F1.
Once you summon the Help system, the program often displays a menu of Help topics. You can choose the appropriate topic for whatever problem you are currently encountering. The program will then display a help screen that contains the desired documentation.
Some programs are more sophisticated, displaying different Help messages depending on where you are in the program. Such systems are said to be context sensitive.
The Macintosh Help system is often referred to as Balloon Help because the help messages appear in a cartoon-like balloon. Newer Macs (starting with System 7.5) also have something called Interactive Help, which contains tutorials that show you how to perform different operations.
A higher-quality version of the 8mm videotape format that offers a sharper picture. Hi8 is the successor to the original Video8 format and is an analog format.
Short for High Floppy Disk, a type of high-density floppy disk developed by Sony that can hold 200 MB of data. Like the competing SuperDisk disk drive from Imation, HiFD disk drives can read and write old 1.44 MB floppy disks in addition to the new high-density disks. HiFD drives support data transfer rates of […]
- High Availability
High Availability, or HA as it is abbreviated, refers to the availability of resources in a computer system, in the wake of component failures in the system. This can be achieved in a variety of ways, spanning the entire spectrum ranging at the one end from solutions that use custom and redundant hardware to ensure […]
- High Dynamic Range
See under High Dynamic Range Imaging (HDRI).
- High Dynamic Range Imaging
Short for High Dynamic Range Imaging, HDRI is an imaging technique that allows for a greater dynamic range of exposure than would be obtained through any normal imaging process. HDRI is now more commonly used for real photograph scenes where, for example, a large range of exposures would be found between sunlight and shadows. However, […]