character-at-a-time printer

NOUN
27 LETTERS · STARTS WITH C

character-at-a-time printer is a valid 27-letter word worth 34 points in Scrabble and 38 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
C3H4A1R1A1C3T1E1R1-0A1T1-0A1-0T1I1M3E1P3R1I1N1T1E1R1
3 + 4 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 0 + 1 + 1 + 0 + 1 + 0 + 1 + 1 + 3 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 1 =34 PTS
DOUBLE WORD → 68TRIPLE WORD → 102
MEANING

What does character-at-a-time printer mean?