Complex sentence: Development which culminated, three centuries later, in the invention of the microprocessor developed for a Busicom calculator in 1971; microprocessors are now at the heart of all computers and embedded systems.
Split into simpler sentences: Development which culminated, three centuries later, in the invention of the microprocessor, developed for a Busicom calculator in 1971. Nowadays, microprocessors are at the heart of all computers and embedded systems.