Changes

==Architecture==

==Architecture==

All digital computer systems, regardless of classification or usage, consist of the following components:

All digital computer systems, regardless of classification or usage, consist of the following components:

* <b>Processing.</b> Provided by one or more [[Central processing unit|CPU]]s, sometimes with ancillary processors, such as [[floating-point]] processors (now usually included as part of the CPU), and array processors (in mainframes and [[supercomputer]]s).

* '''Processing.''' Provided by one or more [[Central processing unit|CPU]]s, sometimes with ancillary processors, such as [[floating-point]] processors (now usually included as part of the CPU), and array processors (in mainframes and [[supercomputer]]s).

* <b>Memory.</b> High-speed local storage, such as [[Random-access memory]]

* '''Memory.''' High-speed local storage, such as [[Random-access memory]]

* <b>Software.</b> Each unique computer hardware environment needs [[software]] that works with the model of processor used in that computer.

* '''Software.''' Each unique computer hardware environment needs [[software]] that works with the model of processor used in that computer.

* <b>Input/Output.</b> Computers are only useful if they can generate output.  Output can vary from control lines for engine components to characters on a video screen.  Input also varies in form, but most computers need input to process, which then drives the output.

* '''Input/Output.''' Computers are only useful if they can generate output.  Output can vary from control lines for engine components to characters on a video screen.  Input also varies in form, but most computers need input to process, which then drives the output.

Most modern computer systems also have peripheral devices:

Most modern computer systems also have peripheral devices:

* <b>Storage.</b> Large amounts of lower-speed, less-expensive hardware where data can be stored for later retrieval.  Storage can be local or it can be remotely accessed via a network.  The most typical form of local storage are hard disks, SSDs, thumb drives, and DVDROMs.  Older mass storage devices include punch cards, paper tapes, magnetic tapes, and CDROMs.

* '''Storage.''' Large amounts of lower-speed, less-expensive hardware where data can be stored for later retrieval.  Storage can be local or it can be remotely accessed via a network.  The most typical form of local storage are hard disks, SSDs, thumb drives, and DVDROMs.  Older mass storage devices include punch cards, paper tapes, magnetic tapes, and CDROMs.

* <b>Other I/O devices.</b> Any number of optional peripheral devices are available for computers, including [[Computer mouse|mice]], scanners, card readers, [[network]] interfaces, [[terminals]], and [[printers]].

* '''Other I/O devices.''' Any number of optional peripheral devices are available for computers, including [[Computer mouse|mice]], scanners, card readers, [[network]] interfaces, [[terminals]], and [[printers]].

==Binary and ternary==

==Binary and ternary==