The 4004 was a marketplace failure:

• slow (approx. 100,000 instructions/sec)
• only 4 bit word size
• Busicom (Japanese financer) abandoned this project after having funded most of development cost.
• Result: gave microprocessor world dominance to Intel

---

• BUSICOM designed various calculators and related products using the 4000 microprocessor family.
• since microprocessor programmable, it had generality of purpose
• could be used for other purposes as well, e.g. a controller, etc..