C4S

{{wiktionary|c4s}}

C4S may refer to:

• C4S (gene), a gene variant for encoding the protein complement component 4
• Clips4Sale, adult video site
• SAP Cloud for Services (C4S), an application in the SAP CRM product line
• Menasco C-4S, an aero engine
• Porsche C4S, a variant of the Porsche 911 (993)
• Porsche C4S, a variant of the Porsche 911 (996)
• command, control, communications, computers, and, surveillance (C4S), a variant of command and control