Browse Definitions :
Definition

classical computing

Classical computing is another name for binary computing. In this traditional approach to computing, information is stored in bits that are represented logically by either a 0 (off) or a 1 (on). Today's processors, including x86 and ARM processors, support classical computing. 

Classical computing contrasts with quantum computing, a type of non-classical computing that represents data in quantum bits (qubits). A classical bit is either on or off, but a qubit can be on and off at the same time, a condition known as superposition.  

Unlike classical computers, quantum computers require specialized and expensive infrastructure. They must operate at near-absolute zero temperatures and be shielded from outside radio waves, light and magnetic fields to prevent errors.

Classical Computing

Quantum Computing

Used by large scale multi-purpose computers and devices.

Used by high speed, quantum mechanics based computers.

Information is stored in bits.

Information is stored in quantum bits.

There are a discrete number of possible states, 0 or 1.

There are an infinite, continuous number of possible states.

Calculations are deterministic, meaning repeating the same input results in the same output.

Calculations are probabilistic, meaning there are multiple possible outputs to the same input.

Data processing is carried out by logic and in sequential order.

Data processing is carried out by Quantum logic at parallel instances.

Operations are defined by Boolean Algebra.

Operations are defined by linear algebra over Hilbert space.

Circuit behavior is defined by classical physics.

Circuit behavior is defined by quantum mechanics.

This was last updated in November 2018

Continue Reading About classical computing

SearchCompliance
  • ISO 31000 Risk Management

    The ISO 31000 Risk Management framework is an international standard that provides businesses with guidelines and principles for ...

  • pure risk

    Pure risk refers to risks that are beyond human control and result in a loss or no loss with no possibility of financial gain.

  • risk reporting

    Risk reporting is a method of identifying risks tied to or potentially impacting an organization's business processes.

SearchSecurity
  • Pretty Good Privacy (PGP)

    Pretty Good Privacy or PGP was a popular program used to encrypt and decrypt email over the internet, as well as authenticate ...

  • email security

    Email security is the process of ensuring the availability, integrity and authenticity of email communications by protecting ...

  • Blowfish

    Blowfish is a variable-length, symmetric, 64-bit block cipher.

SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

  • fault-tolerant

    Fault-tolerant technology is a capability of a computer system, electronic system or network to deliver uninterrupted service, ...

  • synchronous replication

    Synchronous replication is the process of copying data over a storage area network, local area network or wide area network so ...

SearchStorage
  • direct access

    In computer storage, direct access is the process of reading and writing data on a storage device by going directly to where the ...

  • kibi, mebi, gibi, tebi, pebi and exbi

    Kibi, mebi, gibi, tebi, pebi and exbi are binary prefix multipliers that, in 1998, were approved as a standard by the ...

  • holographic storage (holostorage)

    Holographic storage is computer storage that uses laser beams to store computer-generated data in three dimensions.

Close