Tab Explained

In Wikipedia, colons (:) are used to tab.

Tab or tabs may refer to:

Tabulation computing evolved from a mechanical basis using cards gradually between the 1940s and 1990s to a completely electronic basis. The card based systems and components such as sorters and card readers and punches were called "Tab".
The tab key, on a computer keyboard, automates indenting text to a preset position
Tab (archery), the small piece of protective covering to protect the fingers when practicing
Tab (debating), the table of the results of a debating competition
Tab (soft drink), a beverage produced by the Coca-Cola company
Tab (album), by Monster Magnet
Tabs (stage), in theatre, the term for the curtain at the front of the stage
Tablature, a form of musical notation used particularly for guitars and other fretted instruments
Tâb, a board game played in Egypt and elsewhere
Chicago tab, in organizing, a protruding piece of a planar surface that provides an index mark
Tab Ramos, an American soccer player
Tab Hunter, an American actor and musician
TABS, Thermal Activated Building System.

In software

Tab (GUI), a visual marker in a computer application, similar to Chicago tabs (above)
"Tabbed browsing", in a web browser, tabs divide open pages displayed in a single window
Tabs (software), a 3D CAD tool, originally for Acorn Archimedes computers

"Tab", abbreviation of tabloid, a small newspaper format
Tab, a comic strip format
Tab Communications, a former newspaper publisher in Massachusetts, or one of its papers

Bill (payment), informally
In British English, a colloquialism for cigarette
In British Military English, a colloquialism for a forced march
In East Midlands English, a slang term for ear
"Tabs", abbreviation for "tablets", slang for the drug MDMA, or Ecstasy
In British English, a term referring to Cambridge students, used primordially by members of Oxford University