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An excerpt from A pocket computer program for collecting forage selection frequency data in the field, Journal of Range Management,Technical Notes, vol-42, issue 5, SEP 1989, pages 434-436

"                                   Abstract
  An algorithm was developed to conduct bite-count sampling employing a programmable pocket computer. The BASIC program was successfully employed to collect forage selection data on rangeland livestock at a remote field site in Tibet. The program features techniques that are applicable to developing programs for sustained frequency data collection using similar battery-powered computers. Pocket computers have been demonstrated to be powerful field tools, and their potential promises to Increase as new units become available with larger memories and added features.
 …
 … I also decided to minimize the amount of labor involved in the bite-count technique by using a relatively inexpensive, battery-powered, programmable pocket computer, which could be easily used on foot or on horse at the remote field site. The objective of this article is to present the algorithm2, and the programming techniques that permitted successful data collection.

                                    Materials and Methods
Computer
  The pocket computer that I used for frequency data collection was the Sharp1 EL-5400,
 …
Fig. 1. BASIC code of a pocket computer program for collecting livestock forage selection data using the bite-count technique. This program runs on the Sharp EL5400, but with minor changes will run on similar pocket computers. "

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