What does system software actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

Practical computer systems divide software into three major classes: system software, programming software and application software, although the distinction is arbitrary, and often blurred.

Software is computer code that tells a computer how to perform a specific task. Software can include operating systems, applications, and malware.

SaaS or software as a service uses cloud computing to provide users with access to programs via the Internet. It commonly uses a subscription service format.

Software and application security has emerged as a critical discipline in today’s digital landscape, where rising cyber threats and increasing system complexity demand robust protective measures.