There are 3 different version of the DOS ODI Driver on this driver diskette: 1. The "latest" DOS ODI driver, implemented according to the HSM 4.0 specification. This driver requires LSL version 2.11 or higher. This is the recommended driver to be used. 2. The "LAPP" DOS ODI Driver, implemented according to the HSM 4.0 specification. This driver requires LSL version 2.11 or higher. The "LAPP" driver is based on the Look-Ahead Packet Processing Concept. With this driver, you may achieve a slightly better performance in some environments. The driver is found from the subdirectory LAPP. 3. The "old" DOS ODI driver, implemented according to the previous HSM Version B specification. This driver may be used if you do not have an up-to-date version of the LSL.COM (Of course, it is preferred to update your NetWare Software and use the HSM 4.0 driver). The driver is found from the subdirectory OLD.