Point Unit), and the 32201 TCU (Timing and Control Unit) fitted as standard. Such problems with the 32082 MMU had been noted with regard to hardware workarounds adopted in the design of the Whitechapel MG-1 workstation (a somewhat higher-specification product than Acorn's offerings that initially provided National Semiconductor's own Unix variant, Genix, instead of Xenix). Logica had announced general availability of Xenix 3.0 for the 32000 series, featuring "full demand paging virtual memory", for May 1984. Four models were originally planned for launch in the Acorn Cambridge Workstation range: the ACW 100, ACW 121 and ACW 143 being models with 1 MB of RAM (expandable to 4 MB except for the ACW 100), the ACW 443 having 4 MB of RAM; the ACW 143 and ACW 443 offering hard drive storage. A range of languages were bundled as standard, with Acorn emphasising the productivity benefits of having a 32-bit desktop computer with "the computational performance of a super-minicomputer", providing the result of an in-house benchmark test against a VAX 11/750 running 4.2BSD, both in single-user mode and in "typical heavily loaded" multi-user mode, to illustrate and reinforce the message that such a computer could "take the strain off an overloaded super-minicomputer". Queen Mary College was a significant purchaser of the Acorn Cambridge Workstation, having reportedly acquired "no less than 80 of the 300 machines Acorn has sold" by mid-1986. While certain users benefited from a single-user workstation in the way emphasised by Acorn's advertising, specifically that an individual could dedicate their machine to a task and see it completed sooner than the same task queued for execution on a much faster mainframe or supercomputer, Acorn's product saw numerous problems when introduced to a broader audience at the institution. Despite a fairly varied range of programming language products being available for the machine's Panos environment - 32016 assembly language, BASIC, BCPL, Fortran, Lisp, Pascal - mostly giving the impression of being "top-notch" implementations, other kinds of applications were more scarce or suffered from performance issues. System and network reliability proved to be a significant problem in the teaching environment, although the introduction of Panos 1.3 improved the situation "markedly". One academic project struggled with "the initial unreliability and unsuitability of the Acorn workstation as a development machine", reporting slow program build times and the lack of debugging tools that led to other systems being used to develop software for the machine,