Here is a glossary list of the top 20 IT and computing terms, abbreviations, and anagrams along with a brief explanation of their meanings:

Term/Abbreviation/AnagramMeaning
CPUCentral Processing Unit: The primary component of a computer that performs most calculations and executes instructions.
RAMRandom Access Memory: Temporary storage that allows a computer to quickly access data that is currently in use.
GPUGraphics Processing Unit: A specialized electronic circuit designed to rapidly manipulate and alter memory to accelerate the creation of images for display.
HDDHard Disk Drive: A non-volatile storage device that stores and retrieves digital data using magnetic storage and rotating platters.
SSDSolid State Drive: A storage device that uses integrated circuit assemblies to store data persistently, offering faster performance compared to HDDs.
DNSDomain Name System: A decentralized naming system that translates human-readable domain names into IP addresses, facilitating internet communication.
HTMLHypertext Markup Language: The standard markup language used for creating web pages and applications.
VPNVirtual Private Network: A secure connection that allows users to access the internet privately and securely by encrypting their data.
URLUniform Resource Locator: The address used to access a resource on the internet, specifying the protocol, domain, and path.
IPInternet Protocol: The set of rules governing the format of data packets and the addressing scheme used for internet communication.
PHPHypertext Preprocessor: A server-side scripting language commonly used for web development to create dynamic web pages.
SSLSecure Sockets Layer: A cryptographic protocol that ensures secure communication over the internet by encrypting data sent between a server and a client.
LANLocal Area Network: A network that connects devices within a limited geographical area, such as a home, office, or building.
WANWide Area Network: A network that spans a large geographical area, typically connecting multiple LANs or other networks together.
APIApplication Programming Interface: A set of protocols and tools that allows different software applications to communicate and interact with each other.
IoTInternet of Things: The network of interconnected physical devices embedded with sensors, software, and connectivity to exchange data and perform actions.
VoIPVoice over Internet Protocol: A technology that enables voice and multimedia communication over the internet, converting analog audio signals into digital data packets.
GUIGraphical User Interface: A visual way of interacting with a computer system through graphical elements, icons, and buttons, rather than text-based commands.
HTML5The fifth and latest version of the Hypertext Markup Language, introducing new features and enhancements for web development.
JSONJavaScript Object Notation: A lightweight data-interchange format commonly used to transmit data between a server and a web application.

For more extensive lists see the following websites:

https://www.dailywritingtips.com/20-computer-terms-you-should-know/

https://www.indeed.com/career-advice/career-development/technical-terms

https://www.dataprise.com/it-glossary/

https://www.tutorialspoint.com/computer_glossary.htm