rfc

Request For Comments is the extremely modest name for a series of standards defined under the auspices of the IETF that define many of the important components of the Internet.

Reference

rfc-editor.org
once maintained by Jon Postel , and today contracted to AMS by the IETF

RFC's

Atom, a syndication format
The Base16, Base32, and Base64 Data Encodings
BEEP, Blocks Extensible Exchange Protocol
CSV, Comma-Separated Values
DNS, Domain Name System
FTP, File Transfer Protocol
gzip, file format specification
HTTP, Hypertext Transfer Protocol
IMAP, Internet Mail Access Protocol
Internet Checksum
IP, Internet Protocol
JSON, Javascript Object Notation
Kerberos, a network authentication service
LDAP, Lightweight Directory Access Protocol
LDIF, LDAP Data Interchange Fromat
MD4, a message-digest algorithm
MD5, a message-digest algorithm
mime, Multipurpose Internet Mail Extensions
NTP, Network Time Protocol
SASL, Simple Authentication and Security Layer
SCTP, Stream Control Transmission Protocol
SMI, Structure and Identification of Management Information
SMTP, Simple Mail Transfer Protocol
SNMP, Simple Network Management Protocol
TCP, Transmission Control Protocol
TFTP, Trivial File Transfer Protocol
Telnet, an 8-bit byte oriented communication facility
URI, Uniform Resource Identifier
URL, Uniform Resource Locator
URN, Uniform Resource Name
XMPP, Extensible Messaging and Presence Protocol
ZLIB, compressed data format specification