In computing, lightweight software^[1] also called lightweight program and lightweight application, is a computer program that is designed to have a small memory footprint (RAM usage) and low CPU usage, overall a low usage of system resources ^{[citation needed]}. To achieve this, the software should avoid software bloat and code bloat and try to find the best algorithm efficiency.

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• Software optimization
• Application footprint
• Light-weight process
• Lightweight protocol
• Lightweight Procedure Call
• Lightweight programming language
• Lightweight markup language
• Load (computing)