Tag:

Tags, a type of metadata involving the association of descriptors with objects. ~ OR ~ HTML tag, a syntax used to delimit the start and end of an element.

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TCP/IP  (Transmission Control Protocol/Internet Protocol):

TCP/IP (aka the Internet protocol suite) is the set of communications protocols that implement the protocol stack on which the Internet and most commercial networks run. This is the suite of protocols that defines the Internet.
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Terabyte:

1000 or 1024 Gigabytes, depending on what is being measured. When referring to RAM sizes and file sizes, it traditionally has a binary definition, of 1024⁴ bytes. For every other use, it means exactly 1000⁴ bytes..

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TLD  (Top Level Domain):

the last part of an Internet domain name; that is, the letters which follow the final dot of any domain name. For example, in the domain name www.example.com, the top-level domain is com (or COM, as domain names are not case-sensitive)

• country code top-level domains (ccTLD): Used by a country or a dependent territory. It is two letters long, for example .us for the United States.
  
  
• generic top-level domains (gTLD): Used (at least in theory) by a particular class of organizations (for example, .com for commercial organizations). It is three or more letters long. Most gTLDs are available for use worldwide, but for historical reasons .mil (military) and .gov (governmental) are restricted to use by the respective U.S. authorities. gTLDs are subclassified into sponsored top-level domains (sTLD), e.g. .aero, .coop and .museum, and unsponsored top-level domains (uTLD), e.g. .biz, .info, .name and .pro.
  
  
• infrastructure top-level domains (iTLD): The top-level domain .arpa is the only confirmed one. .root has been known to exist without reason.

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Unix:

A computer operating system. It is the most common operating system for servers on the Internet.

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Upload:

Transferring data (usually a file) from a the computer you are using to another computer. The opposite of download.

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URI  (Uniform Resource Identifier):

An address for resources (websites, etc.) available on the Internet.

The first part of a URI is called the "scheme". the most well known scheme is HTTP, but there are many others. Each URI scheme has its own format for how a URI should appear.

Here are examples of URIs using the HTTP, TELNET, and NEWS schemes:

• HTTP://www.domain.com
  
  
• TELNET://www.domian.com
  
  
• FTP://domain.com
  

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URL  (Uniform Resource Locator):

The term URL is basically synonymous with URI. URI has replaced URL in technical specifications.

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URN  (Uniform Resource Name):

A URI that is supposed to be available for along time. For an address to be a URN some institution is supposed to make a commitment to keep the resource available at that address.

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Web:

Short for "World Wide Web."

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Web page or webpage:

A document designed for viewing in a web browser. Typically written in HTML. A web site is made of one or more web pages.

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WebDAV  (Web-based Distributed Authoring and Versioning):

WebDAV was a working group of the Internet Engineering Task Force (IETF). The name is an abbreviation for Web-based Distributed Authoring and Versioning and also refers to the set of extensions to the Hypertext Transfer Protocol (HTTP) that the group defined which allows users to collaboratively edit and manage files on remote World Wide Web servers.

The protocol's aim was to make the Web a readable and writable medium, in line with Tim Berners-Lee's (the father of the internet) original vision.

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Website:

The entire collection of web pages and other information (such as images, sound, and video files, etc.) that are made available. The term has a somewhat informal nature since a large organization might have separate "web sites" for each division, but someone might talk informally about the organizations' "web site" when speaking of all of them.

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WWW  (World Wide Web):

The typical definition of the World Wide Web is; the entire internet. They are essentially synonymous .
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XHTML  (eXtensible HyperText Markup Language):

Basically, HTML written to conform to the XML specification. XHTML is intended to be used in the same places you would use HTML (creating web pages) but is much more strictly defined, which makes it a lot easier to create software that can read it, edit it, check it for errors, etc. XHTML is expected to eventually replace HTML.

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XML  (eXtensible Markup Language):

The Extensible Markup Language (XML) is a general-purpose markup language. It is classified as an extensible language because it allows its users to define their own tags. Its primary purpose is to facilitate the sharing of structured data across different information systems, particularly via the Internet. It is used both to encode documents and serialize data. In the latter context, it is comparable with other text-based serialization languages such as JSON and YAML.

XML is a subset of the older SGML specification - the definition of XML is SGML minus a couple of dozen items.

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