In addition, the sometimes harsh Andean environment meant that agriculture was viewed as a form of warfare so that, as the historian T. N. D'Altroy eloquently put it, The Incas approached farming with weapons in their hands and prayers on their lips (276).
Small Form-Factor Pluggable Transceiver (SFP) A small form-factor pluggable (SFP) transceiver is a compact, hot-swappable, input/output transceiver used in data communication and telecommunications networks. SFP interfaces between communication devices like switches, routers and fiber optic cables, and performs conversions between optical and electrical signals.
Simple File Transfer Protocol (the first protocol abbreviated SFTP), as defined by RFC 913, was proposed as an (unsecured) file transfer protocol with a level of complexity intermediate between TFTP and FTP. It was never widely accepted on the Internet, and is now assigned Historic status by the IETF.