(The first microprocessor — a four-bit device intended for a programmable calculator — was introduced in 1971 and microprocessor-based systems were not readily available for several years.
(Primetimo da je prvi mikroprocesor – 4 - bitni uređaj namenjen programabilnom kalkulatoru predstavljen 1971. godine, a mikroračunarski sistemi nisu bili dostupni još nekoliko narednih godina.