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  2. List of dialling codes in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/List_of_dialling_codes_in...

    This is a list of telephone dialling codes in the United Kingdom, which adopts an open telephone numbering plan for its public switched telephone network. The national telephone numbering plan is maintained by Ofcom , an independent regulator and competition authority for the UK communications industries.

  3. Telephone numbers in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_the...

    In the United Kingdom, telephone numbers are administered by the Office of Communications ( Ofcom ). For this purpose, Ofcom established a telephone numbering plan, known as the National Telephone Numbering Plan, which is the system for assigning telephone numbers to subscriber stations. Telephone numbers are of variable length.

  4. HP calculators - Wikipedia

    en.wikipedia.org/wiki/HP_calculators

    A scientific calculator with more than 240 built-in functions, with 2 lines × 10 digits LCD. The finance-centric programmable calculator from the Voyager series introduced in the 1980s. The longest running product in the HP calculator line, it remains in production. Various models exist, the latest in 2008.

  5. List of TCP and UDP port numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_TCP_and_UDP_port...

    This is a list of TCP and UDP port numbers used by protocols for operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) only need one port for duplex , bidirectional traffic.

  6. Phoning to, from and within the UK - London Forum - Tripadvisor

    www.tripadvisor.com/ShowTopic-g186338-i17-k...

    TO CALL THE UK FROM ITALY OR FRANCE - Intl code + country code + area code (leaving off the initial zero of the area code) + local number, ex. 00 44 20 12345678 ( London) or 00 44 161 123 4567 (Manchester). TO CALL WITHIN LONDON - Dial 8 digit local number, ex. 12345678.

  7. Telephone Number - Optional 0?? - London Forum - Tripadvisor

    www.tripadvisor.com/ShowTopic-g186338-i17-k...

    In South Africa it's 09 and in Russia 810. In the UK it's 00. 44 is the country code for the UK. 0 is the long distance dialling code within the UK, from STD (subscriber Trunk Dialling) used to access the 'long distance' or trunk network. You don't need it if dialling the UK from overseas as the call arrives already on the trunk network.

  8. Comparison of HP graphing calculators - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_HP_graphing...

    Comparison of HP graphing calculators. A graphing calculator is a class of hand-held calculator that is capable of plotting graphs and solving complex functions. While there are several companies that manufacture models of graphing calculators, Hewlett-Packard is a major manufacturer. The following table compares general and technical ...

  9. National conventions for writing telephone numbers - Wikipedia

    en.wikipedia.org/wiki/National_conventions_for...

    All telephone numbers in Iran have 11 digits (initial 0 and ten digits). The first two or three digits after the zero are the area code. The possibilities are: (0xx) xxxx xxxx (for landlines), 09xx xxx xxxx (for cellphones) and 099xx xxx xxx (for MVNO ). When making a call within the same landline area code, initial 0 plus the area code must be ...