The Collaborative International Dictionary of English v.0.48:

Filer \Fil"er\, n.
   One who works with a file.
   [1913 Webster]

WordNet (r) 3.0 (2006):

filer
    n 1: a party who files a notice with a law court
    2: a clerk who is employed to maintain the files of an
       organization [syn: file clerk, filing clerk, filer]

U.S. Gazetteer Places (2000):

Filer, ID -- U.S. city in Idaho
   Population (2000):    1620
   Housing Units (2000): 676
   Land area (2000):     0.798538 sq. miles (2.068203 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.798538 sq. miles (2.068203 sq. km)
   FIPS code:            27730
   Located within:       Idaho (ID), FIPS 16
   Location:             42.569814 N, 114.611313 W
   ZIP Codes (1990):     83328
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Filer, ID
    Filer