Computing
- Server Side Includes, a server-side scripting language used on the Web
- Server System Infrastructure, design specifications for common server hardware elements (e.g. SSI CEB)
- Single Sign In, a specialized form of software authentication
- Single system image, a cluster dedicated operating system
- Small Scale Integration, electronic chips
- The Software Sustainability Institute, a UK-based, academic software organisation
- Strategic Simulations, Inc., a computer gaming company that produced war and simulation games from the mid 1980s to late 1990s.
- Synchronous Serial Interface, electronics
- Serial Peripheral Interface Bus, Often referred to as SSI (Synchronous Serial Interface)
- Serializable snapshot isolation, a way to allow multiple concurrent transactions to see consistent information when making changes to a database
Read more about this topic: SSI