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  2. Standard Industrial Classification - Wikipedia

    en.wikipedia.org/wiki/Standard_Industrial...

    Thus, the Standard Industrial Classification system was born. SIC codes are four-digit numerical representations of major businesses and industries. SIC codes are assigned based on common characteristics shared in the products, services, production and delivery system of a business.

  3. List of Unicode characters - Wikipedia

    en.wikipedia.org/wiki/List_of_Unicode_characters

    Digit Zero: 0017 U+0031 1 49 061 Digit One: 0018 U+0032 2 50 062 Digit Two: 0019 U+0033 3 51 063 Digit Three: 0020 U+0034 4 52 064 Digit Four: 0021 U+0035 5 53 065 Digit Five: 0022 U+0036 6 54 066 Digit Six: 0023 U+0037 7 55 067 Digit Seven: 0024 U+0038 8 56 070 Digit Eight: 0025 U+0039 9 57 071 Digit Nine: 0026 ASCII Punctuation & Symbols: U+ ...

  4. Character encoding - Wikipedia

    en.wikipedia.org/wiki/Character_encoding

    Most codes are of fixed per-character length or variable-length sequences of fixed-length codes (e.g. Unicode). [4] Common examples of character encoding systems include Morse code, the Baudot code, the American Standard Code for Information Interchange (ASCII) and Unicode. Unicode, a well-defined and extensible encoding system, has replaced ...

  5. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    This is a list of Hypertext Transfer Protocol (HTTP) response status codes. Status codes are issued by a server in response to a client's request made to the server. It includes codes from IETF Request for Comments (RFCs), other specifications, and some additional codes used in some common applications of the HTTP. The first digit of the status ...

  6. List of binary codes - Wikipedia

    en.wikipedia.org/wiki/List_of_binary_codes

    This is a list of some binary codes that are (or have been) used to represent text as a sequence of binary digits "0" and "1". Fixed-width binary codes use a set number of bits to represent each character in the text, while in variable-width binary codes, the number of bits may vary from character to character.

  7. Short code - Wikipedia

    en.wikipedia.org/wiki/Short_code

    Common Short Codes beginning with a leading '4' are reserved for private use by wireless network operators. Four-digit Common Short Codes are not permitted due to handset incompatibilities. Short code-based messages vary between zero-rated (paid for by campaign), standard rate (user is responsible for standard carrier charges), and premium rate ...

  8. 30 Scam Phone Numbers To Block and Area Codes To Avoid - AOL

    www.aol.com/19-dangerous-scam-phone-numbers...

    Quick Take: List of Scam Area Codes. More than 300 area codes exist in the United States alone which is a target-rich environment for phone scammers.

  9. North American Industry Classification System - Wikipedia

    en.wikipedia.org/wiki/North_American_Industry...

    The NAICS numbering system employs a five or six-digit code at the most detailed industry level. The first five digits are generally (although not always strictly) the same in all three countries.