Back in the 50's IBM was examining how well the first basic computer performed in World War II and thinking of devoting some resources to computer development. But they were skeptical because they thought that 1 or 2 computers would actually be enough for the world to use. But they went ahead with some development anyways.
These were the days way before the first PC when IBM was king and the mainframe computer ruled with IMS database structure and design, VSAM files along with the first use of 'paging', CICS, diskpacks, mass storage, HSM, TSO/ISPF, COBOL, BAL...and I could go on and on.
I was a computer programmer back then; a mainframe programmer coding COBOL and BAL as a Database Administrator (I got out after 25 years
to actually work with people at 1/4 the salary but 10 times the general happiness). When I first started as a programmer in 1983 I spent a good year typing my programs on keypunch machines producing one card per line of code to be read by a card reader and input to the mainframe.
And I saw the first PC's come out in the early 80's. We really did not know what these odd contraptions were good for until we discovered the ease of writing and printing documents. These IBM PC's had no disk drive, instead they used two floppy disks. One held DOS and the other stored the word processor and any documents you may have created.
Soon after the XT's appeared. These still had 1 or 2 floppy disk drives but used a 10 MB hard drive - I still remember coming into work, turning the XT on and going down for a cigarette and coffee while waiting for it to boot up. What followed were AT's which used high density floppies capable of more storage and then the PS/2's with increased hard drive and memory. The PS/2 actually broke the 640K barrier of RAM which was a huge accomplishment and considered by many to be impossible.
This was about the time Networks became operational in big business and Windows appeared and became widespread. Being a DOS man I resisted Windows for as long as possible until it eventually took over. Nowadays we are lightyears from that first PC we termed a '2-holer' and I'm sure that most of those reading this grew up with computers. Personally I've learned volumes of information and now run a few websites as a side business and, like everyone else, I deal with the constant Malware problem.
Is there anyone else out there that can remember 'the old days'?