HMSO
Started as an admin assistant at HMSO back in 1998. Part way through the year, they moved from the VT220 terminals they had to.... Windows 3.1. Still ran VT220 sessions in windows. But, me being the curious type, started playing with Macros. Soon learnt how to finishing my work by 10.30am
Got hauled into the office one day: Stop doing this. Why? Firstly you're embarrassing the rest of the staff (who somehow managed to make this work last the entire day) and secondly because the IT department don't know what you're doing.
I lasted a year.