Epic Systems (the biggest vendor of EMRs) is one of the primary users of Mumps/Caché. In the early days of the company, technical support was allowed to write in customizations for clients as long as they could fit in a single line of code. This was possible given that one 'feature' of the language is that all the reserved words have a one letter alias. So if you were one of the unlucky ones assigned to support these old customers, you'd run across stuff that looked like "s a w; a f 10; a f s w ^a;".