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Writer Mmc

June 11th, 2010

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The Magnetic card reader writer – from Data History to Flexible Modern Device

The Magnetic card reader writer is one of the most historic methods of data storage. Originally. Magnetic cards were used to store programs, which were then transported between installations and entered into their host computers via the magnetic card reader.

These days, the Magnetic card reader writer is most commonly used as access control, or to verify information about a card holder’s personal details (for example bank details). The simplest form of magnetic card programming and action is a simple yes or no: the card is programmed with a condition, which must be met in order for the system to deliver a “yes” and allow a specified action to occur.

So in the case of a simple access control system, the Magnetic card reader writer might program the magnetic stripe on the back of the card with a pair of dates – the “from” and “to” dates between which the card is valid for entry. This is most commonly seen in the electronic door keys used by modern hotels.

When the card is inserted into the Magnetic card reader writer (in our hotel example, there is a reader writer embedded in the door lock itself), the device reads the “from” and “to” dates encoded in the strip, and sends that information to the computer at the heart of the system. The computer (or in standalone cases, a single Magnetic card reader writer device) is programmed with a set of conditions that the information on the magnetic strip must meet.

In the case of a simply programmed entry and exit card, the computer program matches the actual date with the “from” and “to” dates encoded in the strip. If the actual date falls on or between the “from” and “to” dates, the lock opens. If it doesn’t, it doesn’t.

Clearly on the last day of occupancy, the guest must be able to get in using the Magnetic card reader writer for a short period in the morning (up until checkout). So the computer will probably be programmed with a condition that expresses the following in code: if today’s date matches the “to” date programmed on the card, then only open the door if it is before 1100 hours.

Of course, a magnetic card can theoretically be programmed with as much information as the end user deems necessary. And the conditions for activating a “yes” or “no” response in the system can be concomitantly complicated.

Find Writer Mmc On eBay Below:

USB 20 Memory CardReader Writer Adapter for SD MMC SDHC TF Card UP To 64GBFF
USB 20 Memory CardReader Writer Adapter for SD MMC SDHC TF Card UP To 64GBFF
$0.99
NEW IN BOX Zeikos Hi Speed SD MMC USB 20 Card Reader Writer Front rear caps
NEW IN BOX Zeikos Hi Speed SD MMC USB 20 Card Reader Writer Front rear caps
$0.99
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB PO
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB PO
$0.74
USB 20 Memory Card Reader Writer Adapter for MMC SDHC TF Card Black
USB 20 Memory Card Reader Writer Adapter for MMC SDHC TF Card Black
$2.52
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB HF
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB HF
$0.99
3 x USB 20 Micro SD Card Adapter Reader Writer SDHC MMC Micro Sd 2528c C7Q4
3 x USB 20 Micro SD Card Adapter Reader Writer SDHC MMC Micro Sd 2528c C7Q4
$1.05
SD Card Reader Nobebird USB SD Card Reader Writer for SD SDXC SDHC MMC RS MM
SD Card Reader Nobebird USB SD Card Reader Writer for SD SDXC SDHC MMC RS MM
$8.18
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB XR
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB XR
$4.93
NEW T Mobile Micro USB Card Reader 20 SDHC Memory Writer LED SD MMC Blue
NEW T Mobile Micro USB Card Reader 20 SDHC Memory Writer LED SD MMC Blue
$8.62
New USB 20 SDHC SD MMC Memory Card Reader Writer Adapter Plug and Play Grey
New USB 20 SDHC SD MMC Memory Card Reader Writer Adapter Plug and Play Grey
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USB20 4 in 1 Multi Memory Card Reader Writer for MicroSD SDHC TF M2 MMC Red
USB20 4 in 1 Multi Memory Card Reader Writer for MicroSD SDHC TF M2 MMC Red
$2.84
NEW T Mobile 6Q6Ezl1 Micro USB Card Reader 20 SDHC Memory Writer LED SD MMC
NEW T Mobile 6Q6Ezl1 Micro USB Card Reader 20 SDHC Memory Writer LED SD MMC
$9.05
IOGEAR SD MicroSD MMC Card Reader Writer GFR204SD Green Gray
IOGEAR SD MicroSD MMC Card Reader Writer GFR204SD Green Gray
$22.49
VTG Radio Shack Dazzle 160 3852 Hi Speed SD  MMC Memory Card Reader Writer New
VTG Radio Shack Dazzle 160 3852 Hi Speed SD MMC Memory Card Reader Writer New
$16.99
DAZZLE Reader Writer Nee Hi speed USB 29 SD MMC
DAZZLE Reader Writer Nee Hi speed USB 29 SD MMC
$13.60
SD XD CF MMC MS M2 Card Reader Writer All in One 35 Internal USB 20 CRW UINB
SD XD CF MMC MS M2 Card Reader Writer All in One 35 Internal USB 20 CRW UINB
$6.99
T Mobile Micro USB Card Reader 20 SDHC Memory Writer LED SD MMC Blue CHOP
T Mobile Micro USB Card Reader 20 SDHC Memory Writer LED SD MMC Blue CHOP
$9.81
All in One USB Flash Memory Card Reader SD SDHC Mini Micro M2 MMC Card Writer
All in One USB Flash Memory Card Reader SD SDHC Mini Micro M2 MMC Card Writer
$2.29
INLAND CARD READER WRITER USB SUPPORTS 9 IN 1 CIF SIM MMC SD MD MIS + +
INLAND CARD READER WRITER USB SUPPORTS 9 IN 1 CIF SIM MMC SD MD MIS + +
$12.00
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB PO
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB PO
$0.74
2x USB 20 Multi Card Reader Writer for M2MS ProSDHCMMC Micro SD
2x USB 20 Multi Card Reader Writer for M2MS ProSDHCMMC Micro SD
$6.89
10 in 1 USB 20 SD MMC Card Reader Writer for Sony SanDisk Toshiba Lexar HP
10 in 1 USB 20 SD MMC Card Reader Writer for Sony SanDisk Toshiba Lexar HP
$0.99
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB SY
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB SY
$3.75
NEW T Mobile Micro USB Card Reader 20 SDHC Memory Writer LED SD MMC Blue
NEW T Mobile Micro USB Card Reader 20 SDHC Memory Writer LED SD MMC Blue
$9.10
Tevion USB 20 Memory Card Reader Writer Compact Flash MMC SD Memory Stick Pro
Tevion USB 20 Memory Card Reader Writer Compact Flash MMC SD Memory Stick Pro
$12.95
2X USB 20 Memory Card Reader Writer Adaptor for SD MMC SDHC TF Card 64GB HOT
2X USB 20 Memory Card Reader Writer Adaptor for SD MMC SDHC TF Card 64GB HOT
$1.48
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB QY
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB QY
$4.93
IOGEAR SD MicroSD MMC Card Reader Writer GFR204SD SD MicroSD MMC Green AOI
IOGEAR SD MicroSD MMC Card Reader Writer GFR204SD SD MicroSD MMC Green AOI
$8.70
For USB 20 SD SDHC MMC T Flash Memory Card Reader Writer Pen Drive Black
For USB 20 SD SDHC MMC T Flash Memory Card Reader Writer Pen Drive Black
$3.29
TARGUS High Speed DIGITAL USB Card Reader Writer SD SDHC MMC MICRO SD T F
TARGUS High Speed DIGITAL USB Card Reader Writer SD SDHC MMC MICRO SD T F
$9.95
Super USB Memory Card Reader Writer Adapter for MMC SDHC TF UP To 64GB XR
Super USB Memory Card Reader Writer Adapter for MMC SDHC TF UP To 64GB XR
$4.98
For USB 20 SD SDHC MMC T Flash Memory Card Reader Writer Pen Drive Black
For USB 20 SD SDHC MMC T Flash Memory Card Reader Writer Pen Drive Black
$7.99
New Ultra USB 20 Multi Card Reader Writer MS2MSMS ProSDHCMMCMicro SD
New Ultra USB 20 Multi Card Reader Writer MS2MSMS ProSDHCMMCMicro SD
$8.99
SD Card Reader USB 20 Memory Reader Writer For SD SDHC MMC RS MMC Micro SDXC
SD Card Reader USB 20 Memory Reader Writer For SD SDHC MMC RS MMC Micro SDXC
$9.78
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB RS
USB 20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB RS
$3.99
1PC USB20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB
1PC USB20 Memory Card Reader Writer Adapter for SD MMC SDHC TF Card UP To 64GB
$0.74
Mini USB 20 Memory Card Reader Writer Adaptor for SD MMC SDHC TF UP To 64GB CA
Mini USB 20 Memory Card Reader Writer Adaptor for SD MMC SDHC TF UP To 64GB CA
$0.83
 Iogear Sd Microsd Mmc Card Reader Writer Gfr204sd Green Gray New
Iogear Sd Microsd Mmc Card Reader Writer Gfr204sd Green Gray New
$18.92
IOGEAR KOMEN CURE Extended Capacity MicroSD SD MMC Card Reader Writer Adapter
IOGEAR KOMEN CURE Extended Capacity MicroSD SD MMC Card Reader Writer Adapter
$8.00

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