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The Secure Shell Protocol ( SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. Its most notable applications are remote login and command-line execution. SSH applications are based on a client–server architecture, connecting an SSH client instance with an SSH server.

Windows 10 May 2020 Update (also known as version 2004 and codenamed "20H1") is the ninth major update to Windows 10. It carries the build number 10.0.19041. Version history. The first preview was released to Insiders who opted in to the exclusive Skip Ahead ring on February 14, 2019. The update began rolling out on May 27, 2020.

3-D Secure. Not to be confused with card security code. 3-D Secure is a protocol designed to be an additional security layer for online credit and debit card transactions. The name refers to the "three domains" which interact using the protocol: the merchant/acquirer domain, the issuer domain, and the interoperability domain.

Image:London Underground Zone 1.svg is one such (the underground map of London), which was compiled by wikipedians with handheld GPS units and some software to bold the whole thing together. An impressive piece of work, but still a lot of work.