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2. Frequency-shift keying - Wikipedia

   en.wikipedia.org/wiki/Frequency-shift_keying

   Minimum frequency-shift keying or minimum-shift keying (MSK) is a particular spectrally efficient form of coherent FSK. In MSK, the difference between the higher and lower frequency is identical to half the bit rate. Consequently, the waveforms that represent a 0 and a 1 bit differ by exactly half a carrier period.

3. Shift key - Wikipedia

   en.wikipedia.org/wiki/Shift_key

   The Shift key ⇧ Shift is a modifier key on a keyboard, used to type capital letters and other alternate "upper" characters. There are typically two shift keys, on the left and right sides of the row below the home row. The Shift key's name originated from the typewriter, where one had to press and hold the button to shift up the case stamp to ...

4. Time clock - Wikipedia

   en.wikipedia.org/wiki/Time_clock

   Time clock. A time clock, sometimes known as a clock card machine, punch clock, or time recorder, is a device that records start and end times for hourly employees (or those on flexi-time) at a place of business. In mechanical time clocks, this was accomplished by inserting a heavy paper card, called a time card, into a slot on the time clock.

5. Minimum-shift keying - Wikipedia

   en.wikipedia.org/wiki/Minimum-shift_keying

   In digital modulation, minimum-shift keying ( MSK) is a type of continuous-phase frequency-shift keying that was developed in the late 1950s by Collins Radio employees Melvin L. Doelz and Earl T. Heald. [1] Similar to OQPSK, MSK is encoded with bits alternating between quadrature components, with the Q component delayed by half the symbol period.

6. Amplitude-shift keying - Wikipedia

   en.wikipedia.org/wiki/Amplitude-shift_keying

   Amplitude-shift keying (ASK) is a form of amplitude modulation that represents digital data as variations in the amplitude of a carrier wave. In an ASK system, a symbol , representing one or more bits , is sent by transmitting a fixed-amplitude carrier wave at a fixed frequency for a specific time duration.

7. Table of keyboard shortcuts - Wikipedia

   en.wikipedia.org/wiki/Table_of_keyboard_shortcuts

   Ctrl+⇧ Shift+⌘ Cmd+4 then Space then move mouse and click: Alt+Print Screen click "Copy to Clipboard". GNOME: Ctrl+Alt+Show Windows then move mouse and click Save screenshot of arbitrary area as file ⇧ Shift+⌘ Cmd+4 then click+drag mouse over required area: ⇧ Shift+Print Screen set the name and click "Save". GNOME