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INFO: Full form for SNA is Sensor Network Analyzer in Computing category
SNA also has other full forms in other categories mentioned below.

INFO: Full form for SNA is Shared Network Architecture in Computing category
SNA also has other full forms in other categories mentioned below.

INFO: Full form for SNA is Scalar Network Analyzer in Computing category
SNA also has other full forms in other categories mentioned below.

INFO: Full form for SNA is Shared Network Arrangement in Computing category
SNA also has other full forms in other categories mentioned below.

INFO: Full form for SHDSL is Symmetric High Bitrate Dsl in Computing category
SHDSL also has other full forms in other categories mentioned below.

INFO: Full form for SHDSL is Secure Hdsl in Computing category
SHDSL also has other full forms in other categories mentioned below.

INFO: Full form for SHDSL is Single Pair High Bitrate Dsl in Computing category
SHDSL also has other full forms in other categories mentioned below.

INFO: Full form for SSI is Storage Service Interface in Computing category
SSI also has other full forms in other categories mentioned below.

INFO: Full form for SSI is Subsystem Interface in Computing category
SSI also has other full forms in other categories mentioned below.

INFO: Full form for SSI is System Software Interrupts in Computing category
SSI also has other full forms in other categories mentioned below.

INFO: Full form for SSI is Site Screening Investigation in Computing category
SSI also has other full forms in other categories mentioned below.

Single sign-on (SSO) is an authentication scheme that allows a user to log in with a single ID and password to any of several related, yet independent, software systems.

True single sign-on allows the user to log in once and access services without re-entering authentication factors.

It should not be confused with same-sign on (Directory Server Authentication), often accomplished by using the Lightweight Directory Access Protocol (LDAP) and stored LDAP databases on (directory) servers.

A simple version of single sign-on can be achieved over IP networks using cookies but only if the sites share a common DNS parent domain.

For clarity, a distinction is made between Directory Server Authentication (same-sign on) and single sign-on: Directory Server Authentication refers to systems requiring authentication for each application but using the same credentials from a directory server, whereas single sign-on refers to systems where a single authentication provides access to multiple applications by passing the authentication token seamlessly to configured applications.

Conversely, single sign-off or single log-out (SLO) is the property whereby a single action of signing out terminates access to multiple software systems.

As different applications and resources support different authentication mechanisms, single sign-on must internally store the credentials used for initial authentication and translate them to the credentials required for the different mechanisms.

Other shared authentication schemes, such as OpenID and OpenID Connect, offer other services that may require users to make choices during a sign-on to a resource, but can be configured for single sign-on if those other services (such as user consent) are disabled. An increasing number of federated social logons, like Facebook Connect, do require the user to enter consent choices upon first registration with a new resource, and so are not always single sign-on in the strictest sense.

The Shared Source Initiative (SSI) is a source-available software licensing scheme launched by Microsoft in May 2001. The program includes a spectrum of technologies and licenses, and most of its source code offerings are available for download after eligibility criteria are met.

INFO: Full form for SSI is Self Support Index in Computing category
SSI also has other full forms in other categories mentioned below.

INFO: Full form for SSI is Serial Synchronized Interface in Computing category
SSI also has other full forms in other categories mentioned below.

INFO: Full form for SSI is Size Selective Inlet in Computing category
SSI also has other full forms in other categories mentioned below.

INFO: Full form for SSI is Server Side Interpreter in Computing category
SSI also has other full forms in other categories mentioned below.

Synchronous Serial Interface (SSI) is a widely used serial interface standard for industrial applications between a master (e.g. controller) and a slave (e.g. sensor). SSI is based on RS-422 standards and has a high protocol efficiency in addition to its implementation over various hardware platforms, making it very popular among sensor manufacturers. SSI was originally developed by Max Stegmann GmbH in 1984 for transmitting the position data of absolute encoders – for this reason, some servo/drive equipment manufacturers refer to their SSI port as a "Stegmann Interface".It was formerly covered by the German patent DE 34 45 617 which expired in 1990. It is very suitable for applications demanding reliability and robustness in measurements under varying industrial environments.

It is different from the Serial Peripheral Interface Bus (SPI): An SSI bus is differential, simplex, non-multiplexed, and relies on a time-out to frame the data. An SPI bus is single-ended, duplex,and uses a select-line to frame the data. However, SPI peripherals on microcontrollers can implement SSI with external differential driver-ICs and program-controlled timing.