Record-keeping for a colony of 15,000 mice without use of a computer

An economical and easy to learn method of record-keeping was developed which utilizes standard office supply 3 5 cards for cage cards and central office records. The method developed has been used to maintain all records of a mouse colony of 18 inbred strains and substrains for 9 yr. With this system, detailed pedigrees, postmortem data, tumor incidence, and average age are available in minutes.