Code 11 is a barcode symbology developed by Intermec in 1977. It is used primarily in telecommunications. The symbol can encode any length string consisting of the digits 0–9 and the dash character (-). A twelfth code represents the start/stop character, commonly printed as "*". One or two modulo-11 check digit(s) can be included. The valid codes have one wide bar, and may have one additional wide element (bar or space). The decode table has 15 entries because the symbols with two wide bars (1, 4 and 5) are listed twice.