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ABC of electronics terms

(To find chips for distinct functions, see the functional pages.)

H

Hard Disk Drive

See also

• ATAPI
• IDE
• SCSI

Book

All the major interfaces are published in this book, which in its 8th edition last time I looked. This book is also good for IT and MIS types who have to do hard disk drive exchanges on computers, as every hard disk drive manufacturer -- and the model numbers for their products! -- are published in it. All in all, if you were ever looking for a book on IDE, SCSI or hard disk drives, this is the one book you want the latest edition of. It even comes with a CD of hard disk diagnostics tools that you'll find useful.
(Review by George Mena)

Hardware

Hayes command set

HDLC

High level Data Link Control is a standard communication link protocol established by the International Standards Organization (ISO). HDLC is the discipline used to implement ISO X.25 packet switching systems.

Is this new? No, Intel already announced a chip (the 8273) for it in it's 1978 databook. It's now used in the implementation of ISDN it seems. (Click on the advertisement above for more.)

HDSL

• High Density Serial Link
• High bit-rate Digital Subscriber Line

HDTV

Heatsink

HIPPI

History of computing

Book:

History of electronics

Home automation

Also see Lonworks.

Home built computer