organised by Papra Technology Limited. organised by Rapra Technology Limited. organised by Rapra Technology Ltd. Rapra Technology Limited. organised by Rapra Technology Ltd., 20th-22nd Mar. 1991. organised by IEE Design Committee. organised by professional group committee. organised by Rapra Technology Ltd., 15th and 16th Nov. 1990. organised by Rapra Technology Ltd., 22nd and 23rd Mar. 1990.