Telnet was developed in NUMBER@1 beginning with RFC NUMBER@2 , extended in RFC NUMBER@3 , and standardized as Internet Engineering Task Force -LRB- ORGANIZATION@1 -RRB- Internet Standard STD NUMBER@4 , one of the first Internet standards .

It was developed in NUMBER@1 beginning with RFC NUMBER@2 and is now defined as ORGANIZATION@1 STD NUMBER@4 , which is one of the first Internet standards .
