電腦容量問題

kilo K -- 2^10 or 10^3
mega M -- 2^20 or 10^6
giga G -- 2^30 or 10^9
tera T -- 2^40 or 10^12
peta P -- 2^50 or 10^15
exa E -- 2^60 or 10^18
zetta Z -- 2^70 or 10^21
yotta Y -- 2^80 or 10^24
3.5inch磁碟?3.5inch-floppy就係1982年面世...HP製造~~果陣就得264KB...
而硬碟方面...3.5inch-harddisk就係1991年面世...IBM製造~~果陣得1GB...
而家d harddisk最抵買(可以話流行la~~)就係250GB...
不過你話...幾多位元(bit)...
250*1000*1000*1000*8=2,000,000,000,000bit
以 Maxtor　7B250R0　250GB / 7200rpm / Serial ATA　$560為例
$1就可以買到3,571,428,571bit=446MB
以 Hitachi Global Stor Tech　25DLAT80　250GB / 7200rpm / UDMA133　$528為例
$1就買到3,787,878,788bit=473MB

http://zh.wikipedia.org/w/index.php?title=Terabyte&variant=zh-tw

http://en.wikipedia.org/wiki/Floppy_disk#The_3.C2.BD-inch_microfloppy_diskette
The 3½-inch microfloppy diskette
Sony introduced their own small-format 90.0 × 94.0 mm disk, similar to the others but somewhat simpler in construction than the AmDisk. The first computer to use this format was the HP-150 of *****1983*****, and Sony also used them fairly widely on their line of MSX computers. Other than this the format suffered from a similar fate as the other new formats; the 5¼-inch format simply had too much market share. Things changed dramatically in 1984 when Apple Computer selected the format for their new Macintosh computers. By 1988 the 3½-inch was outselling the 5¼-inch.
上面的一段在Wikipedia copy的，該是1983年

現在每GB最平的是250GB
http://www.jumbo-computer.com/pricelist.asp