Oki Electric OKITAC S series

Oki Electric, in June 1989, began selling two new workstation models. The 4/50 was a high-performance workstation that was standard equipped with a GX graphics accelerator and added a newly custom designed SPARC processor to the OKITAC S series, which had been supplied by Sun Microsystems Japan as OEM. The 4/25 was an entry-level workstation that was optimized as an extremely affordable diskless client computer. The final model, the 4/75, came with the GXplus graphics accelerator and featured upgraded network performance by offering for the first time the PrestoServe S-Bus accelerator, which increased the throughput of the network file system that made file access transparent.