Complex sentence: While continuing to develop Entera, two primary versions of the software were developed: the Transmission Control Protocol (TCP) version and the Distributed Computing Environment (DCE), the latter based on DCS Cell Directory Service, the DCE endpoint mapper, and DCE threads.
Split into simpler sentences: While continuing to enhance Entera, two primary versions of the software were developed. The other primary version, Distributed Computing Environment (DCE), was based on DCS Cell Directory Service, the DCE endpoint mapper, and DCE threads.