tab index
A form of the index used when the ordinary cut INDEX is not
feasible, such as with loose-leaf bindings. The
set of 24 tabs (I and J are generally combined and
X is omitted) are prepared in one strip of
material, which is glued along half its length,
leaving splits for attachment to the leaves. The
letters are printed or blocked on the strip and
the individual letters are then separated. The
tabs are attached to the leaves in a complete
series along the fore edge from head to tail (and
usually from front to back) with the letters
projecting. (276 )