on-premises, on-prem

Software and technology located within the physical confines of an enterprise, often in the company’s data center as opposed to running remotely on hosted servers or in the cloud.

Open PGP

A popular encryption standard that protects the privacy and integrity of sensitive files. Open PGP is an open-source offshoot of PGP that uses PGP as its foundation. Everything You Need to Know About Open PGP Encryption

open source

Software that comes with permission to use, copy, and distribute, either as-is or with modifications, and that may be offered either free or with a charge.

Open Worldwide Application Security Project (OWASP)

The Open Worldwide Application Security Project is an online community that produces freely-available articles, methodologies, documentation, tools, and technologies in the field of web application security. The OWASP provides free and open resources.

operating system (OS)

The software that supports a computer's basic functions, such as scheduling tasks, executing applications, and controlling peripherals. Examples include Windows, IBM i, Linux, VIOS, AIX, and UNIX.

optical character recognition (OCR)

The process of detecting and extracting text from an image file, an image embedded within an electronic document, or a scan of a document.

original equipment manufacturer (OEM)

A company that produces complex equipment (such as a computer system) from components usually bought from other manufacturers.