Vacuum tube.
The transistor replaced the vacuum tube as the primary component in electronic devices, offering smaller size, lower power consumption, and higher reliability. This transition marked the beginning of the semiconductor era in electronics.
the vacuum tube
Vacuum tubes are neither useful nor advantageous in modern computers. These were replaced decades ago by the integrated circuit.
At this point, we don't know. Inventions build on the discoveries of the past. Modern computers could not have been invented without the previous invention of the microchip. The microchip could not have been invented without the previous invention of the transistor. The transistor could not have been invented without the previous invention of the vacuum tube. The vacuum tube could not have been invented without the previous invention of electricity. What will be invented between now and 2030? We need to know the answer to that question before we could even speculate on what will happen in 2030.
The tube was initially invented by Heinrich Geissler, a German physicist, in the mid-19th century. His invention of the Geissler tube, an early version of the vacuum tube, played a critical role in the development of modern electronic technology.
Transistors were first developed in 1947 by Bell Telephone laboratories. They replaced vacuum tubes, which were big, bulky, costly, and unreliable. Transistors are most often used to regulate the flow of an electrical current and to switch electricity on and off.
A vacuum tube is simply a tube with no oxygen nor carbon dioxide in it (aka no air).
Millman's theorem
who made the vacuum tubes
Kilobytes and vacuum tubes are not in the same category. At best, a twin triode vacuum tube is a single flip-flop and can hold 1 bit of information, making a vacuum tube about 0.000122 of a kilobyte.
an electron tube containing a near-vacuum that allows the free passage of electric current.