The design of a call numbering system will include a
decision on the number of elements and type of symbols and the
way they will be combined. Baader (1957) records different
examples of good practice in selecting symbols that avoid
confusion, making labels easier to read and file etc. With library
automation, many problems in symbol confusion (e.g. I and 1, or
O and 0), or number length have become less relevant. Many useful
devices such as the use of capitals and lower case letters to make
a distinction, and the use of symbols and punctuation marks,
however, started to cause problems in online shelf list catalogues
(Howard, 1990; Kniesner, 1995; Marker, 1996).
The design of a call numbering system will include a
decision on the number of elements and type of symbols and the
way they will be combined. Baader (1957) records different
examples of good practice in selecting symbols that avoid
confusion, making labels easier to read and file etc. With library
automation, many problems in symbol confusion (e.g. I and 1, or
O and 0), or number length have become less relevant. Many useful
devices such as the use of capitals and lower case letters to make
a distinction, and the use of symbols and punctuation marks,
however, started to cause problems in online shelf list catalogues
(Howard, 1990; Kniesner, 1995; Marker, 1996).
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