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It was certainly meant to be a product, so do not understand the reverting. Not a sucessful one commercially, but was intended to be so by Tymshare in the mid-1970s. W Nowicki (talk) 03:14, 14 April 2011 (UTC)
This cumbersome system was first called the Z-Code System, because the commands all began with the letter Z, and later, the Off-Line System (OLS). When the funding finally materialized for a more advanced computer so multiple users could be on-line simultaneously, the acronym OLS was already taken, so Engelbart settled for NLS.
Have not been able to find any source that supports this. So I will change to paraphrase cited sources. W Nowicki (talk) 16:43, 20 April 2011 (UTC)