R U W
- - -
R R R
R U W
- - -
U U U
R U W
- - -
W W W
At this point it is well to note that it may be preferable in some instances where small files are concerned to use only a portion of the classification formula in the filing sequence. In such cases, only those parts of the filing sequence which are necessary should be used along with the final and key.
III. Subsecondary:
| III | to | OOO. |
| III | OOO |
The sequence of the subsecondary is as follows:
III IIM IIO IMI IMM IMO IOI
--- --- --- --- --- --- ---
III III III III III III III
IOM IOO MII MIM MIO MMI MMM
--- --- --- --- --- --- ---
III III III III III III III
MMO MOI MOM MOO OII OIM OIO
--- --- --- --- --- --- ---
III III III III III III III
OMI OMM OMO OOI OOM OOO OOO,
--- --- --- --- --- --- etc., to ---
III III III III III III OOO
each numerator in turn becoming the denominator for the complete sequence of numerators as listed above.
IV. Major:
The following sequence is used when loops appear in both thumbs:
S M L S M L S M L
- - - - - - - - -
S S S M M M L L L