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  2. Vehicle tracking system - Wikipedia

    For detailed vehicle locating and tracking this is still the predominant method; however, many companies are increasingly interested in the emerging cell phone technologies that provide tracking of multiple entities, such as both a salesperson and their vehicle. These systems also offer tracking of calls, texts, web use and generally provide a ...

  3. Mobile computing - Wikipedia

    These networks are usually available within a range of commercial cell phone towers. High-speed network wireless LANs are inexpensive but have a very limited range. Security standards: When working mobile, one is dependent on public networks, requiring careful use of VPN. Security is a major concern while concerning the mobile computing ...

  4. Digital electronics - Wikipedia

    The binary number system was refined by Gottfried Wilhelm Leibniz (published in 1705) and he also established that by using the binary system, the principles of arithmetic and logic could be joined. Digital logic as we know it was the brain-child of George Boole in the mid 19th century.

  5. Pulse-code modulation - Wikipedia

    For audio, this type of encoding reduces the number of bits required per sample by about 25% compared to PCM. Adaptive differential pulse-code modulation (ADPCM) is a variant of DPCM that varies the size of the quantization step, to allow further reduction of the required bandwidth for a given signal-to-noise ratio .

  6. Space-based solar power - Wikipedia

    Space-based solar power (SBSP) is the concept of collecting solar power in outer space and distributing it to Earth.Potential advantages of collecting solar energy in space include a higher collection rate and a longer collection period due to the lack of a diffusing atmosphere, and the possibility of placing a solar collector in an orbiting location where there is no night.

  7. Virginia Tech - Wikipedia

    Harper and her white roommate received hate mail and threatening phone calls but the resolution stood and the display of the rebel flag ended in 1969. The Confederate flag on Virginia Tech class rings became optional in 1972 and could be left off of the ring at the student's request. [29]

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