1979 freshly graduated with an electronics education, affordable computers just became available. At that time I bought a state of the art VIC-20, not exactly knowing what one possibly can do with a device like that. As it turned out,there was not too much you could do with it without having some sort of data storage device attached to it , to read in programs or to save programs. That was where the DATASETTE came into play.
A device that looked like an audio cassette tape, if you remember those days. The same kind of cassettes that later were used in Sony's legendary Walkman and of course home audio systems. As a data storage device it was very slow, but speed in the old days did not really matter so much. A "wow, that works !" had a lot more meaning than a minute sooner or later.
With the newly accquired VIc-20 and datasette new worlds could be discovered. 8 color graphics on a low resolution TV screen, but to make a square red and to move it acorss the scrren, well ....well that was magic.
By the way, the memory of that computer was only 20 kB ! So that was in 1979 or 1980. The onboard computer that brought the astronauts to the moon did not have much more memory either, whereby the Vic-20 had much more techinical advanced memory technology than the appollo moon technology.
Around the time that modems were invented, the ACCOUSTIC COUPLER was invented. A device to transform the high and low signal of the computer into audible sounds. that could have been trnasmitted via the phone line with the goal to connect to other computers.
The golden days of COMPUSERVE and DATEX-P20 in Europe started.
That was the best selling computer in history. 17 Million pieces sold. Unbelievable !
There was even a floppy drive available for the C64. A 5.25 inch soft disk to store data.Compared to the datasette speed, the floppy drive was lightning fast.
On the programming side of things, The commodore came with an integrated Basic Interpreter. A very rude top down Basic Interpreter. The other option was ofcourse was to program in assembler. As time went on I believe there were other programming languages available. I.E Pascal.
At that time the cpu speed was about 1 Mhz . The Z80 processor was having a
And along came the XT based on an 8080 chip. XT = Extended Technology.
At times address or/nd interrupt conflicts made a lot of trouble.
Access to the internet at that time required that you install the trumpet winsock as a dialup connection.The Linux Operating System came around the corner and many things became more accessible.
The first graphical browser that could display images was Mosaic.
Windows versions came and went. 3.1, 95,98,XT ,Win 7, Win 8, Win 8.1 and
The laptop development went from 8 kg to 800 grams.
My first LAPTOP was a SX-64. I can not recall the weight, but I am sure it was in the 8kg range.
Sharp MZ-700 optional build in color plotter. Z-80 CPU