Browse Definitions by Alphabet

  • Q format - Q (number) format is a fixed-point method of coding fractional and whole integers for processing by a computer’s CPU or a digital signal processor (DSP).
  • QR code (quick response code) - A QR code (quick response code) is a type of 2D bar code that provides easy access to information through a smartphone camera.
  • quad-core processor - A quad-core processor is a chip with four independent units called cores that read and execute central processing unit (CPU) instructions such as add, move data and branch.
  • quad-level cell NAND (QLC NAND) - Quad-level cell NAND (QLC NAND) is a form of NAND flash memory that can store up to 4 bits of data per memory cell.
  • quality control (QC) - Quality control (QC) is a procedure or set of procedures intended to ensure that a manufactured product or performed service adheres to a defined set of quality criteria or meets the requirements of the client or customer.
  • quality of service (QoS) - Quality of service (QOS) refers to any technology that manages data traffic to reduce packet loss, latency and jitter on a network.
  • quantum cryptography - Quantum cryptography is a method of encryption that uses the naturally occurring properties of quantum mechanics to secure and transmit data.
  • quantum interference - Quantum interference is when subatomic particles interact with and influence themselves and other particles while in a probabilistic superposition state.
  • quantum internet - The quantum internet is a theoretical system of interconnected quantum computers that uses quantum signals to send information rather than radio waves.
  • quantum key distribution (QKD) - Quantum key distribution (QKD) is a secure communication method for exchanging encryption keys only known between shared parties.
  • quantum supremacy - Quantum supremacy is the experimental demonstration of a quantum computer's dominance and advantage over classical computers by performing calculations previously impossible at unmatched speeds.
  • qubit (short for quantum bit) - A qubit (short for quantum bit) is the basic unit of information in quantum computing and counterpart to the bit (binary digit) in classical computing.
  • query - A query is a question or a request for information expressed in a formal manner.
  • queue depth - Queue depth, in storage, is the number of pending input/output (I/O) requests that a storage resource can handle at any one time.
  • Quiz: Mobile Device Security -- Who else can hear me now? - Mobile device security and compliance regulations can be as hard to pin down as a strong connection for your smartphone.
  • QWERTY keyboard - The QWERTY (pronounced KWEHR-tee) keyboard is the standard typewriter and computer keyboard in countries that use a Latin-based alphabet.
  • What are quantum coherence and decoherence? - Quantum coherence and decoherence are fundamental indications of how well a system of quantum objects -- atoms or other quantum particles -- maintains its relationships and how reliably the ongoing operation of that quantum system can be predicted over time.
  • What is a quality gate? - A quality gate is a milestone in an IT project that requires that predefined criteria be met before the project can proceed to the next phase.
  • What is a quantum engineer? - Quantum engineering is a technological field that focuses on the principles of quantum physics.
  • What is a quantum logic gate? - A quantum logic gate is a basic quantum device that operates on a small number of quantum bits or qubits.
  • What is Q-learning? - Q-learning is a machine learning approach that enables a model to iteratively learn and improve over time by taking the correct action.
  • What is QAM (quadrature amplitude modulation) and how does it work? - QAM (quadrature amplitude modulation) is a method of combining two amplitude modulation (AM) signals into a single channel.
  • What is Qlik? - Qlik is a software vendor specializing in data visualization, executive dashboards and self-service business intelligence products.
  • What is qualitative data? - Qualitative data is descriptive information that focuses on concepts and characteristics, rather than numbers and statistics.
  • What is quality assurance (QA)? - Quality assurance (QA) is any systematic process of determining whether a product or service meets specified requirements.
  • What is quality of experience (QoE or QoX)? - Quality of experience (QoE or QoX) is a measure of the overall level of a customer's satisfaction and experience with a product or service and the vendor that's providing that product or service.
  • What is quantum as a service? Definition and top providers - Quantum as a service (QaaS), or quantum computing as a service, is a cloud-based way for organizations to access quantum computing technologies and capabilities more affordably through a third-party provider.
  • What is quantum computing? How it works and examples - Quantum computing is an area of computer science focused on the development of computers based on the principles of quantum theory.
  • What is quantum in physics and computing? - A quantum, the singular form of quanta, is the smallest discrete unit of any physical entity.
  • What is quantum machine learning? How it works - Quantum machine learning (QML), also called quantum-enhanced machine learning, blends the computing power of quantum systems with the increasing computing demands of evolving machine learning models.
  • What is quantum superposition? - Quantum superposition is the ability of a quantum system to act as if it is in multiple states at the same time until it is measured.
  • What is quantum theory? - Quantum theory, or quantum mechanics, is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the subatomic level.
  • What is quishing (QR code phishing)? - QR code phishing, or 'quishing,' is a social engineering phishing attack that intentionally deceives its recipient into scanning a QR code, redirecting the person to a bogus website.