Viaweb [SEP] programming language
Viaweb
Viaweb was a web-based application that allowed users to build and host their own online stores with little technical expertise using a web browser. The company was started in July 1995 by Paul Graham, Robert Morris (using the pseudonym "John McArtyem"), and Trevor Blackwell. Graham claims Viaweb was the first application service provider. Viaweb was also unusual for being partially written in the Lisp programming language. 
The software was originally called Webgen, but another company was using the same name, so the company
RTML
RTML is a proprietary programming language used exclusively by Yahoo!'s Yahoo! Store and Yahoo! Site web hosting services.
History.
The language originated at Viaweb, a company founded in 1995 by Paul Graham and Robert T. Morris, as the template language for their e-commerce platform. RTML stands for "Robert T. Morris Language". The RTML editor was offered as an option for customers (usually small businesses) who wanted to customize their online stores more than the built-in templates allowed.