Among the worst of barbarisms is that of introducing symbols which are quite new in mathematical, but perfectly understood in common, language. Writers have borrowed from the Germans the abbreviation n! to signify 1.2.3…(n-1).n, which gives their pages the appearance of expressing surprise and admiration that 2, 3, 4 &c. should be found in mathematical results.
Augustus De Morgan, The Penny Cyclopædia of the Society for the Difusion of Useful Knowledge, London, 1842, vol. 23, p. 444