Experience with 100 colonoscopies in 88 patients in a community hospital is presented. The instrument used was the F09000PL 165 cm ACMI colonoscope for the first 88 cases, and the F9A 160 cm ACMI colonoscope for the last 12. There were no complications. The preparation of the patient and the technique of colonoscopy and polypectomy are detailed. Indications and contraindications are outlined and discussed. Colonoscopy in this series has definitely saved 16 patients and possibly another 20 patients from laparotomy.