JCII:- Japan Camera Inspection and Testing Institute. It is an organization in Japan to monitor export quality of Japanese made cameras.
JPEG:- format for compressed graphics files. JPEG graphics are commonly used as part of World Wide Web.
Joule:- unit used to quantify the light output of electronic flash. A joule is equal to one watt second of 40 lumen-seconds. The measure is used to compare flash units in terms of power output.