V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

8N1
       8 [bits], No [parity bit], 1 [stop bit] (MODEM, BIT)


The Free On-line Dictionary of Computing (30 December 2018):

8N1

    Common shorthand for "eight data bits, no parity,
   one stop bit", the most common configuration for serial
   lines, e.g. EIA-232.

   (1995-01-31)