3 (number) - in Technology

In Technology

• The resin identification code used in recycling to identify polyvinyl chloride.
• On most telephone keypads, the "3" key is also associated with the letters "D", "E", and "F".

• The glyph "3" may be used as a substitute for yogh (Ȝ, ȝ) or Greek xi (Ξ, ξ) or ze (З, з) when those characters are not available.
• Three is the minimum odd number of voting components for simple easy redundancy checks by direct comparison.
• Three is approximately pi (actually closer to 3.14159) when doing rapid engineering guesses or estimates. The same is true if one wants a rough-and-ready estimate of e, which is actually approximately 2.7183.
• "3" is the DVD region code for many East Asian countries, except for Japan (which is Region 2) and China (which is Region 6).
• "3" is the trading name of mobile network operator Hutchison 3G.
• Channel 3 is the television channel traditionally associated with ITV in the UK, and, since 1990, the broadcaster's legal name.
• The television VHF channel most often used in North America for hooking up VCRs and/or video game systems. If it is otherwise occupied by a local broadcaster, then channel 4 is used instead.
• Some may use "3" as an alternate to the letter "E", often in jest or when using Leetspeak, to denote being experienced in certain technology related fields. See also: Numb3rs and Leetspeak
• In Resource Description Framework, subject-predicate-object expressions are referred to as triples, because they contain 3 values.