My Grandpa Hein grew up with horses when automobiles were experimental and he lived to see men land on the moon. That was a tremendous change he went through. In the same way I have gone through another tremendous change from large computers occupying rooms to an even more powerful computer in my pocket, my smart phone.
The Cray 1 was one of the first supercomputers. Supercomputers were and are built for performance, for quickly calculating numbers. The Cray 1 blew away the competition in the 1970s. In 2013, Roy Longbottom in comparing a Raspberry Pi 1 to a Cray 1 wrote “In 1978, the Cray 1 supercomputer cost $7 Million, weighed 10,500 pounds and had a 115 kilowatt power supply. It was, by far, the fastest computer in the world. The Raspberry Pi [1] costs around $70 (CPU board, case, power supply, SD card), weighs a few ounces, uses a 5 watt power supply and is more than 4.5 times faster than the Cray 1.” I own a Raspberry Pi 400 (RPi 400) and the CPU is an ARM A72, which is a pretty normal cell phone CPU. He later ran a floating point benchmark on the RPi 400. My $100 RPi 400 is 78.5 times faster than a Cray 1.
What is the big difference between the Cray 1 and the RPi 400? It is the clock speed. The Cray 1 ran at only 80 MHz and my RPi 400 runs at 1800 MHz. The RPi 400 clock speed is 22.5 times faster than the Cray 1. Taking away the clock speed means the floating point improvements or gains are roughly 3.5 times. And it is miniaturization that puts the transistors closer together to allow for these extra performance gains, and miniaturization is also what allowed the clock speed to increase.
Moore’s Law is an observation that about every two years the number of transistors in a microchip doubles. This self-fulfilling observation has driven the industry to make smaller and smaller transistors and thus allowed the clock speed to increase without the chips overheating. Unfortunately Moore’s Law has ended or is ending because the transistors are now approaching the size of atoms. It is becoming physically impossible to continue to shrink the transistors.
Computer storage also has had an amazing evolution. We have gone from a computer disk the size of a washing machine to fingernail size disks. We have gone from 8 inch floppies that hold 80,000 bytes to disks today that hold 22,000,000,000,000 bytes (22 TB). I remember purchasing in 1994-95 for work a 2 GB (2,000,000,000 bytes) disk for $2000. 30 years later you can get a 22 TB disk that costs $420 and has 11,000 times more storage. My phone has more storage than that 2 GB disk from 30 years ago. Computer storage has also benefited from miniaturization. That fingernail size (11mm x 15mm) microSD disk can today hold up to 1.5 TB.
Computer technology has transformed the world. I have written about the amazing computer performance advances that have taken place, but computers have become parts of phones, automobiles, and even washing machines. Think of the influence of the internet. The internet is all about computers sharing information. Computer technology is everywhere. So what is next? Right now, there is a lot of talk about artificial intelligence (AI). Will computers eventually become intelligent beings? Or will AI assist us in our tasks and only be a tool for us to use? We will have to see.







