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  2. Personal digital assistant - Wikipedia

    en.wikipedia.org/wiki/Personal_digital_assistant

    The Palm TX. A personal digital assistant (PDA) is a multi-purpose mobile device which functions as a personal information manager. Following a boom in the 1990s and 2000s, PDAs were mostly displaced by the widespread adoption of more highly capable smartphones, in particular those based on iOS and Android in the late 2000s, and thus saw a rapid decline.

  3. Pushdown automaton - Wikipedia

    en.wikipedia.org/wiki/Pushdown_automaton

    In order to make a PDA as strong as a TM, we need to save somewhere the data lost through 'pop'. We can achieve this by introducing a second stack. In the TM model of PDA of last paragraph, this is equivalent to a TM with 3 tapes, where the first tape is the read-only input tape, and the 2nd and the 3rd tape are the 'push and pop' (stack) tapes.

  4. Pocket PC - Wikipedia

    en.wikipedia.org/wiki/Pocket_PC

    These devices ran Windows CE 2.0–2.11 and had an interface that was similar to the then-current desktop versions of Windows like Windows 95. The first of these was the Everex Freestyle, also known as HTC Kangaroo, from 1998. [17] Other examples include Casio Cassiopeia E-10/E-11, Compaq Aero 1500/1520, Philips Nino and HP Jornada 420/430.

  5. The Three Questions - Wikipedia

    en.wikipedia.org/wiki/The_Three_Questions

    The man pledged allegiance to the king, asked for forgiveness and went on his way. The king asked the hermit again for his answers, and the hermit responded that he had just had his questions answered: 1. The most important time is now. 2. The most important person is whoever you are with. 3. The most important thing is to help the person you ...

  6. Personal computer - Wikipedia

    en.wikipedia.org/wiki/Personal_computer

    An artist's depiction of a 2000s-era desktop-style personal computer, which includes a metal case with the computing components, a display and a keyboard (mouse not shown). A personal computer, often referred to as a PC or simply computer, is a computer designed for individual use. [1]

  7. Mobile computing - Wikipedia

    en.wikipedia.org/wiki/Mobile_computing

    A personal digital assistant (PDA) is a small, usually pocket-sized, computer with limited functionality. It is intended to supplement and to synchronize with a desktop computer, giving access to contacts, address book, notes, e-mail, and other features. A Palm TX PDA

  8. Operating system - Wikipedia

    en.wikipedia.org/wiki/Operating_system

    Android, iOS, and iPadOS are mobile operating systems, while Windows, macOS, and Linux are desktop operating systems. [3] Linux distributions are dominant in the server and supercomputing sectors. Other specialized classes of operating systems (special-purpose operating systems), [4] [5] such as embedded and real-time systems, exist for many ...

  9. Psychological abuse - Wikipedia

    en.wikipedia.org/wiki/Psychological_abuse

    Psychological abuse, often known as emotional abuse or mental abuse or psychological violence or non-physical abuse, is a form of abuse characterized by a person subjecting or exposing another person to a behavior that may result in psychological trauma, including anxiety, chronic depression, clinical depression or post-traumatic stress disorder amongst other psychological problems.