Histoy of computer data
istoy of computer data
Today we are accustomed to having hundreds of gigabytes of storage capacity in our computers. It was pure science fiction just a few decades ago.and it was in the 1980s. Not too long ago!
PingDom stores a lot of monitoring data every day, and considering how important we consider today’s storage capacity, it’s interesting to look back and keep things in perspective. A look at some of the most exciting storage devices of the early computer age.
). The 4096 bit selector was 10 inches long and 3 inches wide.duction problems, so it was never successful.
Top: 1024 bit selectors.
Note that punch cards are used before computers. They were used in the textile industry as early as 1725 (to control mechanized textile looms).
Punch Card Fortran Program.
Top: Fortran Program Cards: Z (1) = Y + W (1)
Punch card reader and punch card writer.
Top left: cart card reader. Top right: Punch card writer.
Like punch cards, punched tape was originally introduced by the textile industry for the use of mechanized looms. For computers, punch tape can be used for input data but also for output data.
Top: 8 level punch tape (8 holes per hole).
Magnetic drum memory.
Invented all the routes of 1932 (in Austria), it was widely used as an important working memory of computer in 1950s and 60s. In the mid-1950s, the magnetic drum memory capacity was about 10 KB.
Magnetic drum memory.
Top left: UNIVAC computer magnetic drum memory. Top right: 16 inch long drum from IBM 650 computer. It had 40 tracks, 10 KB of storage space, and rotated at 12,500 revolutions per minute.
Hard disk drive
The first hard disk drive was the IBM Model 350 disk file, which came in 1956 with the IBM 305 remake computer. It had a 50-inch disk with a total storage capacity of 5 million characters (less than 5 MB only).
Top: IBM Model 350, first time hard disk drive.
It was the size of a refrigerator, which weighed 550 pounds (250 kg), and ranged in price from $ 81,000 to $ 142,400 when it was introduced.
Really large hard disk drives.
Top left: 250 MB hard disk drive from 1979. Top right: IBM 3380, the first gigabyte hard disk drive since 1980.
Hard disk drives called SyQuest were targeted for personal computers and for many years there was no relevant competition from desktop publishers for the transfer of large documents. Introduced in 1983, the first SyQuest SQ306RD had a 5MB hard drive for data types (currently), including audio and video. In 1986, 44 MB SQ555 and SQ400 were available in the market.
Top: Removable hard disk SyQuest 44 MB.
We mention it primarily here because it was a precursor to CD-ROM and other optical storage solutions. It was mainly used for movies. The first commercially available laser disk system was on the market in late 1978 (then called laser videodesk and more active branded disco vision) and had a diameter of 11.81 inches (30 cm). The disc can hold up to 60 minutes of audio / video on each side. The first laser discs had completely analog material. The basic technology behind laser discs was invented in 1958.
Top left: laser disc with a regular DVD. Top right: Another laser disc.
Disks, or floppy disks (because they were flexible) were invented by IBM and were in common use from the mid-1970s to the late 1990s. The first floppy disk was 8 inches, and later came in 5.25 and 3.5 inch formats. The first floppy disk, introduced in 1971, had a capacity of 79.7 kB, and was read-only. A readable version came out a year later.
Old floppy disks.
Top left: An 8-inch floppy and floppy drive with a regular 3.5-inch floppy disk. Top right: Easily removable storage media facility.
Magnetic tape was first used in 1951 for data storage. The tape device was called UNISERVO and UNIVAC I was the main I / O device on the computer. The effective transfer rate for UNISERVO was approximately 77 77,200 characters per second.
Old tape drives for older computers
Top left: A line of tape runs on a UNIVAC I computer. Top right: Introduced in IBM 3410 Magnetic Tape Subsystem, 197.