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Print Screen (often abbreviated Print Scrn, Prnt Scrn, Prnt Scr, Prt Scrn, Prt Scn, Prt Scr, Prt Sc, Pr Sc, or PS) is a key present on most PC keyboards. It is typically situated in the same section as the break key and scroll lock key.
The earliest editors (designed for teleprinter terminals) provided keyboard commands to delineate a contiguous region of text, then delete or move it. Since moving a region of text requires first removing it from its initial location and then inserting it into its new location, various schemes had to be invented to allow for this multi-step process to be specified by the user.
The hyphen-minus (keyboard hyphen), en dash, em dash, and mathematical minus/negative symbols are different (see WP:Manual of Style/Dashes). Pressing the -on your keyboard, usually next to the 0 (zero) key, will produce a hyphen-minus. Methods of producing the other characters are described below.
Windows 95 required the key to be on a keyboard to get the "Designed for Windows" logo, and used it to bring up the Start Menu. It was quickly added by virtually all desktop keyboard manufacturers. The first laptop to bear Windows keys on its keyboard was the Gateway Solo. [4]
Larry Tesler created the concept of cut, copy, paste, and undo for human-computer interaction while working at Xerox PARC to control text editing.During the development of the Macintosh it was decided that the cut, paste, copy and undo would be used frequently and assigned them to the ⌘-Z (Undo), ⌘-X (Cut), ⌘-C (Copy), and ⌘-V (Paste).
Some common aspect ratios for computer displays. 4:3 is an old non-widescreen monitor standard, also used in some tablet computers. The first popular widescreen ratio for computer displays was 16:10, and 16:9 has been the most common ratio since 2012.
A laptop computer or notebook computer, also known as a laptop or notebook, is a small, portable personal computer (PC). Laptops typically have a clamshell form factor with a flat-panel screen on the inside of the upper lid and an alphanumeric keyboard and pointing device on the inside of the lower lid.
The keyboard sends the key code to the keyboard driver running in the main computer; if the main computer is operating, it commands the light to turn on. All the other indicator lights work in a similar way. The keyboard driver also tracks the shift, alt and control state of the keyboard.