Other
- Callan (TV series), UK spy series, 1967–72
- Callan (film), a 1974 film version of the TV series
- Clara Callan, 2001 novel by Richard B. Wright
- Callan Data Systems, 1980s U.S. a computer manufacturer
- Camp Callan, former U.S. army training center
- USS General R. E. Callan (AP-139), U.S. Navy transport ship
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