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