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Reference.org
Algorithmic state machine
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<p>The algorithmic state machine (ASM) is a method for designing <a href="/facts/Finite-state_machine/GMusWd0a">finite-state machines</a> (FSMs) originally developed by Thomas E. Osborne at the <a href="/facts/University_of_California%2c_Berkeley/MXVEjklr">University of California, Berkeley</a> (UCB) since 1960, introduced to and implemented at <a href="/facts/Hewlett-Packard/abuNSYNu">Hewlett-Packard</a> in 1968, formalized and expanded since 1967 and written about by Christopher R. Clare since 1970. It is used to represent diagrams of digital <a href="/facts/Integrated_circuit/fjn6vg7C">integrated circuits</a>. The ASM diagram is like a <a href="/facts/State_diagram/XAjvtq7t">state diagram</a> but more structured and, thus, easier to understand. An ASM chart is a method of describing the sequential operations of a digital system. </p>