serially

From serial + -ly.

serially (not comparable)

1. In series, one after the other, as opposed to in parallel.
   • 1953 November, 'Erca', “Ticket Frauds in the East”, in Railway Magazine, page 779:

     All tickets are serially numbered by machine as they are printed, and while two tickets of the same number should not occur, it could possibly happen through a fault in the printing machine.

• (in series): in parallel, parallelly