Unicom was bought by Rockwell International at around the same time as it purchased Sumlock Anita ('72/'73). At that time it already had a portfolio of calculators, such as the Unicom 201, which was rebadged as an Anita 201 in the U.K. after the merger of the companies. This Unicom 104 uses a Rockwell I.C. (the same one as in the Anita 811), but has no switches for rounding or memory---both are always enabled. This gives for an irritatingly inaccurate result, and for all results from pressing the equals key accumulated into the memory. It does have a memory indicator though (unlike the Anita 811), with a dot in the far left display segment being illuminated. But since this is almost always on, it is not very useful. It also lacks a percent key, which the I.C. is capable of utilising, so this model really only uses a subset of the capabilities of its processor.
Try it out---it works!
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