Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The IBM PALM processor (Put All Logic in Microcode) was a board-level 16-bit processor used in the IBM 5100 Portable Computer, a predecessor of the IBM PC. PALM was also used in the IBM 5110 and IBM 5120 followon machines. PALM was likely used in other IBM products as an embedded controller. IBM referred to PALM as a microprocessor, though they used that term to mean a processor that executes microcode to implement a higher-level instruction set, rather than its conventional definition of a complete processor on a single silicon integrated circuit. The PALM processor was an entire circuit board containing 13 square metal-can bipolar gate arrays, 3 conventional DIP transistor-transistor logic (TTL) parts and 1 round metal can part.

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