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A derogatory pun on "field service". The field serviceorganisation of any hardware manufacturer, but especiallyDEC. There is an entire genre of jokes about DEC fieldcircus engineers:Q: How can you recognise a DEC field circus engineer with aflat tire?A: He's changing one tire at a time to see which one is flat.Q: How can you recognise a DEC field circus engineer who isout of gas?A: He's changing one tire at a time to see which one is flat.See Easter egging for additional insight on these jokes.There is also the "Field Circus Cheer" (from the plan filefor DEC on MIT-AI): Maynard! Maynard! Don't mess with us! We're mean and we're tough! If you get us confused We'll screw up your stuff. (DEC's service HQ is located in Maynard, Massachusetts).