The Collaborative International Dictionary of English v.0.48:

Tabulation \Tab`u*la"tion\, n.
   The act of forming into a table or tables; as, the tabulation
   of statistics.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tabulation
    n 1: information set out in tabular form [syn: tabulation,
         tabular matter]
    2: the act of putting into tabular form; "the tabulation of the
       results"

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "tabulation":
   analysis, arrangement, booking, cataloging, categorization, chart,
   chronicling, classification, codification, division, enlistment,
   enrollment, entering, entry, filing, grading, grouping,
   impanelment, indexing, inscribing, inscription, insertion,
   inventorying, itemization, listing, logging, matriculation,
   pigeonholing, placement, posting, ranging, ranking, rating,
   record keeping, recordation, recording, register, registration,
   registry, sorting, stratification, subdivision, taxonomy,
   typology