Final answer:
The smallest type of processor is the Embedded Processor, which is more compact and specialized than the processors found in mainframes, personal computers, and PDAs. Embedded processors are integral to many modern devices and were part of the evolution following the introduction of microprocessors like those in the Altair 8800 and Apple II.
Step-by-step explanation:
The smallest type of processor among the options provided is b) Embedded Processors. While the microprocessor revolution started in the early 1970s, leading to the development of personal computers, embedded processors are typically even smaller and are integrated into various devices for specific functions, not necessarily running a general-purpose operating system. They can be found in a wide array of modern appliances and gadgets, from microwaves and cameras to automobiles and industrial machines.
It's interesting to note that the journey to these powerful, compact systems started with entities like the Intel Corporation and products such as the Altair 8800, which utilized microprocessors to offer unprecedented computing power to the public. This wave of innovation included systems like the Apple II, which helped establish Apple as a major player in the market, and the IBM PC, significantly contributing to the success of Microsoft by creating new demand for personal computing software.