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).
- 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.
- QAM (quadrature amplitude modulation) - QAM (quadrature amplitude modulation) is a method of combining two amplitude modulation (AM) signals into a single channel.
- Qlik - Qlik is a software vendor specializing in data visualization, executive dashboards and self-service business intelligence products.
- 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.
- 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.
- 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.
- qualitative data - Qualitative data is information that cannot be counted, measured or easily expressed using numbers.
- quality assurance (QA) - Quality assurance (QA) is any systematic process of determining whether a product or service meets specified requirements.
- 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 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.
- 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.
- 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 - A quantum (plural: quanta) is the smallest discrete unit of a phenomenon.
- quantum computing - Quantum computing is an area of study focused on the development of computer technologies based on the principles of quantum theory.
- 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.
- quantum theory - Quantum theory is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic and subatomic level.
- 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.