Term of the Moment
disk mirroring
Definition: What's in this encyclopedia
Following are samples of the 50,000+ entries, photos, diagrams and charts in this tech reference, written by Alan Freedman, one of the first computer programmers in America (more about the author at the end of this page).
Hot Topics
Of course, AI is the hottest tech term on the planet. Crypto is up and down but still on people's minds, and the amazing chip is pure science fiction. See AI glossary, crypto glossary, active area, chip manufacturing and hot topics and trends.
Talk Like a Pro
This is the only encyclopedia that highlights the correct way to speak like a pro; for example, never mix up terms in never say. See dataset, nontrivial, intranet, smart, virtual and digispeak.
You Wouldn't Think to Look Up
See technology bloopers, Bitcoin pizza, Does it matter?, good user interface, naming misnomers, underwater datacenter, smart, wares and home theater.
A Course in Computer Literacy
This reference is designed to teach, not just explain, and every fundamental computer term is included. See computer, cloud, data processing, PC, information system, binary, program, operating system, cache, application, chip and storage vs. memory.
Our Cross Referencing Helps You Learn
Our 70,000+ links within the definitions cross refence to supporting concepts and products.
Concepts
Every important technical concept is included. See chip, graphics pipeline, LCD, OLED, SSD, software stack, flash memory and byte addressable.
Crypto Blockchains
It Takes Two to Tango
Hardware is useless without software, and vice versa. See smartphone, tablet, desktop computer, x86, ARM, Apple M series, image editor, application suite and Web browser.
Popular Devices and Standards
Quick summaries. See iPhone versions, iPad, Mac models, Galaxy S, Pixel phone and standards.
History
Programming
The heart and soul of tech, major languages and programming concepts are included. See source code, programming concepts, programming language, if-then-else, program logic and AI programming.
Essential Charts
Very useful charts for students and coders. See ASCII chart, space/time and binary values.
Networking
All important networking terms are here. See Internet, WAN, LAN, Ethernet, switch, wireless router and access point.
Humor Is Essential
Written by an Educator
Now in his eighties, Alan Freedman still authors what he started in 1981 and also writes the programs that turn this text into website feeds (see C).
The Classic Nerd
At HumanX AI Conference in Las Vegas
Hot Topics
Of course, AI is the hottest tech term on the planet. Crypto is up and down but still on people's minds, and the amazing chip is pure science fiction. See AI glossary, crypto glossary, active area, chip manufacturing and hot topics and trends.
Talk Like a Pro
This is the only encyclopedia that highlights the correct way to speak like a pro; for example, never mix up terms in never say. See dataset, nontrivial, intranet, smart, virtual and digispeak.
You Wouldn't Think to Look Up
See technology bloopers, Bitcoin pizza, Does it matter?, good user interface, naming misnomers, underwater datacenter, smart, wares and home theater.
A Course in Computer Literacy
This reference is designed to teach, not just explain, and every fundamental computer term is included. See computer, cloud, data processing, PC, information system, binary, program, operating system, cache, application, chip and storage vs. memory.
Our Cross Referencing Helps You Learn
Our 70,000+ links within the definitions cross refence to supporting concepts and products.
Concepts
Every important technical concept is included. See chip, graphics pipeline, LCD, OLED, SSD, software stack, flash memory and byte addressable.
There are more than a thousand crypto terms in this reference (see crypto glossary).
It Takes Two to Tango
Hardware is useless without software, and vice versa. See smartphone, tablet, desktop computer, x86, ARM, Apple M series, image editor, application suite and Web browser.
Popular Devices and Standards
Quick summaries. See iPhone versions, iPad, Mac models, Galaxy S, Pixel phone and standards.
Everything stems from the past. See early calculators, early computers, early memory and early direct access devices.
Programming
The heart and soul of tech, major languages and programming concepts are included. See source code, programming concepts, programming language, if-then-else, program logic and AI programming.
Essential Charts
Very useful charts for students and coders. See ASCII chart, space/time and binary values.
Networking
All important networking terms are here. See Internet, WAN, LAN, Ethernet, switch, wireless router and access point.
Face it... tech can be tedious, and cartoons appear where applicable. See how to spoof your techie friends, buffer flush and Stringy Floppy.
Written by an Educator
Now in his eighties, Alan Freedman still authors what he started in 1981 and also writes the programs that turn this text into website feeds (see C).
Freedman was a lucky guy in 1962. Only two years into his career, he could sit for part of the day. See plugboard.
In 2025, 63 years later, Freedman is still learning. Although he knows a lot about the tech world, his passion is the chip, and in live presentations, he proves the chip is pure magic. See HumanX and about this encyclopedia.