Assertion: personal computer's keyboard | /r/HasProperty | difficult to type
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text: The PCjr, IBM model number 4860, retained the IBM PC's 8088 CPU and BIOS interface for compatibility, but its cost and differences in the PCjr's architecture, as well as other design and implementation decisions (chief among these was the use of a "chiclet" keyboard, which was difficult to type with), eventually led to the PCjr, and the related IBM JX, being commercial failures.