CSF is an abbreviation of:

• Classical swine fever (also called hog cholera)
• Cerebrospinal fluid
• The Collegiate Statesmen Foundation, a non-profit educational organization
• Complement Set Filtering
• Content Structure Format
• Content Sealed Format, secure graphical rendition format
• Critical Success Factor
• California Scholarship Federation
• Caltech Satanic Fellowship
• Christian Special Forces
• Christian Student Fellowship
• Collège de la Sainte Famille, a Jesuit school in Cairo, Egypt
• Common Service Framework, a solution from Oracle corp.

City Service Firm, Football hooligan gang attaching themselves to Bristol City football club

• Cal State Fullerton, a university in Southern California
• Configuration State Function
• Computer Support Forums

CSF