#HTTP #Trivia
> The #misspelling of #referrer was introduced in the original proposal by computer scientist #PhillipHallamBaker to incorporate the field into the #HTTP #specification. The misspelling was set in stone by the time of its incorporation into the #RequestForComments standards document #RFC1945; document co-author #RoyFielding has remarked that neither "#referrer" nor the misspelling "#referer" were recognized by the standard #Unix spell checker of the period.
https://en.wikipedia.org/wiki/HTTP_referer#Etymology