re to put the data occurs. The answer is that the data should be placed at where the communication cost is lowest, but the problem is whether it is easy to describe the distributed database or not. The performance is also the problem. We thought we had to choose the good tool. Therefore, We have Preprint submitted to Elsevier Preprint 21 February 1997 ORB Java Interpreter Java Interpreter WWW Server Server Client Skelton Java Interpreter Java Interpreter TCP/IP WWW Client Proxy CAMAC Simple HTTP Server Netscape Java Program Fig. 1 HORB Architecture Fig. 2 Scaler monitor without HORB investigated the feasibility of the distributed object technology on the DAQ using Java, HORB and OLE. Java and HORB provide powerful network computing. HORB is Java plus ORB (Object Request Broker) and parallel & distributed & persistent object oriented language. HORB architecture is shown in Fig.1. There is no IDL(
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