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Punched Card
-Card size was 7 3⁄8 in × 3 1⁄4 in (187.325 mm × 82.55 mm).
-It was first used in textile factories to control looms.
-loom factories
-speed, increased efficiency
-easily damaged -
Drum Memory
-20cm x 10cm 500.000 bit
-memory storage of machines
-large corporations
-speed, increased efficiency, no moving parts
-very heavy -
8" Floppy Disk
-8” 79.7kb
-So the first disks were designed for loading microcodes into the controller of the Merlin (IBM 3330)
-the public for general storage
-Portable, speed, re-writeable memory
-large and fragile -
Compact Disk (CD)
- 11.5 cm 700Mb
- Originally design to store digital audio
- Public audio CD
- No moving parts, speed, small
- Fragile,
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Jazz Disk
-10cm 1GB
-Where made for home users
-Used by the public for storage and the transfer of data
-Capacity,
-Large and fragile -
USB Flash Drive
-Aka USB stick,
-When it was created, there was a product which could only hold 8MB of data, not they can hold a max of 1Tb
-USB 1.0 1.5 Mb/s
-USB 2.0 12 Mb/s (Roughly 10x faster then USB 1.0) 2008
-USB 3.0 150 Mb/s(Roughly 10x faster then USB 2.0) 2012 -
Blueray Disk
- Single density=25Gb
- Double density=50Gb
- Requires it’s own player/reader, other than the standard disk reader,
- Can be expensive,
- Roughly £6 per disk,
- Used for 720/1080p Films (HD)
- 4.5Mb/s
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Cloud Storage
- Online storage,
- All information is stored on a hard drive in a different location (off-site) and then accessed online,
- This can be vulnerable to hacks as the data can be accessed from anywhere in the world as long as they have the right user and password,
- This has a practically infinite storage capability, as you can connect many HDD’s together,
- Can be used to store anything from a document to media like films,
- Advantage, can’t get stolen if someone steals from your house,