SPP or
spp as an abbreviation or initialism can refer to several things:
- Samoan Plantation Pidgin, an English-based pidgin language that was spoken by plantation workers in Samoa
- Science Power Platform, planned Russian module of the International Space Station
- Security and Prosperity Partnership of North America, an agreement founded by the governments of Canada, Mexico and the United States
- Sequenced Packet Protocol, a network transport layer protocol promulgated by Xerox
- Serial Port Profile, a Bluetooth wireless interface profile
- Serviciul de Protecţie şi Pază, the Romanian Protection and Guard Service
- Showbiz Pizza Place, a restaurant chain popular in the 1980s
- Singapore People's Party, a political party in Singapore
- Sino-Platonic Papers, an Asian Studies journal
- Slovenský plynárenský priemysel, a Slovak natural gas company
- The Society for Philosophy and Psychology, a North American scientific society
- Southwest Power Pool, a North American reliability organization
- "spp.", an abbreviation for species (plural form)
- Specific Physical Preparedness, the status of being prepared for the movements in a specific activity
- SPP-1 Underwater Pistol, an underwater pistol
- Steyr SPP, a caliber machine pistol
- Street Performer Protocol, a way of encouraging the creation of creative works in the public domain
- Super Princess Peach, a video game developed by TOSE for Nintendo
- Surface plasmon polariton, a type of polariton from strong coupling of electromagnetic waves
- System Platform Processor, used in the NVIDIA nForce2
- Swaziland Progressive Party, a political party in Swaziland
- Swiss People's Party, a right-wing political party in Switzerland
- Standard Peak Production, a method to compare cow's milk productions independently on their age or days in milk
- Self propelled particle, a method to explain movement of crowds