The RDI PowerLite was a SunSparc 5-compatible laptop. In the mid 1990’s there were few Sun OS laptops available compared with MS DOS and Macintosh models. I guess the cost of the MicroSparcII processor made these too expensive for popular adoption. Also, UNIX-based computing was yet as popular as it is today (Unbuntu, RedHat, etc.) so there was less of a market for this kind of laptop
Around 1991 AST sold the Premium Exec 386SX/20 laptop that ran MS Windows 3.1. AST was a leader in Windows laptops because they made their machines upgradable. A person could swap out RAM and the CPU to upgrade the machine.
We have received a lot of interesting computer donations recently, and we’re very grateful to the local community that continues to support the cause of historical computer preservation.