FSP

• Familial Spastic Paraparesis
• Fellow of The School of Pharmacy
• Fibre saturation point
• Fibrin Split Products, a test of clotting dysfunction in human physiology. Also known as fibrin degradation products
• Florida State Prison
• Folha de São Paulo
• Folsom State Prison
• Food Stamp Program
• Foro de São Paulo
• Freedom Socialist Party
• Free State Project
• FSP Group, Taiwanese PSU manufacturer.
• Saint Pierre Airport, the IATA airport code.
• Florent Sinama Pongolle, a French footballer
• Functional sentence perspective

In Computing

• File Service Protocol, a UDP-based protocol similar to File Transfer Protocol
• MS Windows file system drivers refer to "File System Process" as the asynchronous part of a file I/O call executed in a system worker thread context.