Answer:
Transistors transformed the world of electronics and had a huge impact on computer design. Transistors made of semiconductors replaced tubes in the construction of computers. By replacing bulky and unreliable vacuum tubes with transistors, computers could now perform the same functions, using less power and space.
Pentium is just a brand of a CPU chips from Intel that is usually in your laptops or chromebooks. It's used for general purpose computing. Produced by Intel since 1993.