Classes in horb/orb/*.class are required to run an applet in a WWW browser. Those classes are loaded from the server automatically on demand basis.
In order to start communication, at least the following classes must be loaded as a part of ORB.
horb.orb.HORB ( 1858 bytes) horb.orb.BasicIOCI ( 8354 bytes) horb.orb.HorbURL ( 2715 bytes) horb.orb.IOCI ( 4432 bytes) horb.orb.IOCICommon ( 9133 bytes)
The amount of the sizes of the above classes is about 24KBytes.
Note that an applet might use all classes in the horb/orb directory.