Category: Resource access and delivery Purpose: General Interest Audience(s): Undergraduate student How to find print books and government publications by call number on the Library shelves. Finding call number and location information in Omni Locate books: availability and location information Interpreting call numbers for print books (LC) Interpreting LC call numbers The library uses Library of Congress (or LC) call numbers, which have letters and numbers. Books on similar topics are shelved together. Here is how to find the call number HM1091 .B47: First, find the letter(s). Single letters come before double: H, HB, HM Next, find the first number: Numbers start at 1 and follow in numerical order, so look for 1,091. Last, look at the second letter/number. Find the letter first, then the number, which is read like a decimal: .B4, .B41, .B452 all come before .B5 Call number locations See the Waterloo Library floor plans for information about which call numbers are found on each floor. Interpreting call numbers for government publications (CODOC) Government Document call numbers are made up of codes that classify documents by country and by departments within countries. A breakdown of CODOC call number construction by section Call number section Example call number 1: CA1 BS57 C003 Example call number 2: CA2ON NR403 80P15 Country CA – Canada CA – Canada Level of Government 1 – Federal 2 – Provincial Province/State  ON – Ontario Dept./Agency BS – Statistics Canada(was Bureau of Statistics) NR – Natural Resources Dept. Subdivision 57 403 Date of Publication  80 (ie 1980) Title Indicator (monographs)  P15 Title Indicator (serials) C003  CODOC Shelving Tips Tip #1 Government documents are shelved by call number, alpha-numerically from left to right. Write out the call number on two lines. For monographs, the second line starts with the date code: CA2ON NR403 80P15 should be CA2ON NR403 80P15 For serials and ongoing publications such as annual reports, dates are not given and so the second line starts with the letter/number code for the title. CA1 BS57 C003 should be CA1 BS57 C003 Tip #2 Serials are shelved before monographs within each department and agency. CA1 DA A53 1980/81 comes before CA1 DA 88 L55 Tip #3 The numbers on line one are whole numbers. The numbers on line two that are a part of the letter/number code are not. On line one, the number sequence is determined by the entire number as shown, but also note that a blank space following the Dept/Agency code is counted as a zero. CA1 DA_ comes before CA1 DA4 which comes before CA1 DA35 On line two, the number sequence is determined by comparing the digits within the number. Sequence: 14, 350, 4 would read as 140, 350, 400 CA1 DA35 L435 comes before CA1 DA35 88 L55