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8-inch floppy disk, inserted in drive, (3½-inch floppy diskette, in front, shown for scale) 3½-inch, high-density floppy diskettes with adhesive labels affixed The first commercial floppy disks, developed in the late 1960s, were 8 inches (203.2 mm) in diameter; [4] [5] they became commercially available in 1971 as a component of IBM products and both drives and disks were then sold ...
A Maxell-branded 3-inch Compact Floppy Disk. The floppy disk is a data storage and transfer medium that was ubiquitous from the mid-1970s well into the 2000s. [1] Besides the 3½-inch and 5¼-inch formats used in IBM PC compatible systems, or the 8-inch format that preceded them, many proprietary floppy disk formats were developed, either using a different disk design or special layout and ...
Tracks 36–42 are non-standard. The bitrate is the raw one between the read/write head and signal circuitry so actual useful data rate is a factor 5/4 less due to GCR encoding. [18] The 1541 disk typically has 35 tracks. Track 18 is reserved; the remaining tracks are available for data storage.
Drives supporting this format were offered by a number of manufacturers and soon became common for moving smaller amounts of data. This disk format became known as the Single Sided Single Density or SSSD format. It was designed to hold the same amount of data as 3000 punch cards. [17] 8-inch disk drive with diskette 3½-inch disk for comparison
The drive was invented by Martin Bodo, Bob Rosenbloom, Ken Wong, Alan Lorenz and Igor Lokhmotov. Bodo said that "Slow floppies always bugged me.
From January 2008 to December 2012, if you bought shares in companies when William B. Gordon joined the board, and sold them when he left, you would have a 163.1 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
From January 2008 to December 2012, if you bought shares in companies when Naomi O. Seligman joined the board, and sold them when she left, you would have a 47.8 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
There are several techniques for transferring data from a PCW to an IBM-compatible PC, some of which also can transfer in the opposite direction, and service companies that will do the job for a fee. [ 22 ] [ 35 ] [ 36 ] [ 37 ] While all the 3-inch disks were double-sided, the PCW 8256's 3-inch drive and the PCW 8512's upper one were single ...