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--- c4c:history [30/06/2024 22:26] – created - external edit 127.0.0.1
+++ c4c:history [04/07/2025 12:01] (current) – andrew
@@ Line 23: / Line 23: @@
 In the 1950's computers started to be used for commercial purposes such as business accounts, but by today's standards they were very large, expensive to run and had limited storage. A typical 1950's computer would cost £1million and have 4k of memory to store information being processed, that's 4,000 bytes of memory.
-One big improvement came with the use of magnetic tape and magnetic disks to store information, this allowed computers to process more information and access the information more quickly. In the picture on the right, you can see Magnetic Tape devices in the middle at the back, at the front on the left, you can see washing machine sized units which housed the Magnetic Disks.
+One big improvement came with the use of magnetic tape and magnetic disks to store information, this allowed computers to process more information and access the information more quickly. In the picture on the right, you can see Magnetic Tape devices in the middle at the back, at the front on the left, you can see washing machine sized units which housed the Magnetic Disks. These were sometimes called Winchester Disks as they had 20Mb removeable storage on the top and 20Mb fixed hard disk at the bottom, I have heard they were called Winchester Disks after a Winchester 20/20 shotgun.
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 {{:c4c:ibm5150_ibm.jpg?200 |IBM 5150}}
 With the launch of the first IBM personal computer, the desktop computer had arrived in a shape which most of us would recognise as a computer. Although the first model had only a green screen, 8Mhz CPU and 256K (not MegaBytes!), it had a keyboard and looked familiar.\\
+{{ c4c:luggable.jpg?200|}}IBM even produced a "Luggable" version of this, not quite the image of portable computing we have today, but a sign of the things to come.
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+This had an attached keyboard, small amber CRT for the display, several 8 bit ISA slots and a handle on the back to carry it.
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