Flash Memory
 Flash memory is a form of EEPROM (Electrically-Erasable Programmable Read-Only Memory) that allows multiple memory locations to be erased or written in one programming operation. In layman's terms, it is a form of rewritable memory chip that, unlike a Random Access Memory chip, holds its content without the need of a power supply. It is also an example of a Non-Volatile Read Write Memory (NVRWM). The memory is commonly used in memory cards , USB flash drives , MP3 players , digital cameras and mobile phones .
Flash memory is non-volatile, which means that it does not need power to maintain the information stored in the chip. In addition, flash memory offers fast read access times (though not as fast as volatile DRAM memory used for main memory in PCs) and better shock resistance than hard disk. These characteristics explain the popularity of flash memory for applications such as storage on battery-powered devices like mobile phones and personal digital assistants .
 Normal EEPROM only allows one location at a time to be erased or written. For that reason, flash memory can operate at higher effective speeds when the system architecture allows simultaneous multiple reads to take place during a single write (to different locations).
Flash memory is made in two forms: NOR flash and NAND flash. The names refer to the type of logic gate used in each storage cell. Both types of flash memory and EEPROM wear out after many erase operations, due to wear on the insulating oxide layer around the charge storage mechanism used to store data. A typical NOR flash memory unit wears out after 10,000-100,000 erase/write operations, a typical NAND flash memory after 1,000,000.
Flash memory is essentially an NMOS transistor with an additional conductor suspended between the gate and source/drain terminals. This variation is called the Floating-Gate Avalanche-Injection Metal Oxide Semiconductor (FAMOS) transistor.
Mini DV
 The MiniDV format is used in both consumer and professional equipment and resolves in excess of 500 horizontal lines. Capable of broadcast quality video, MiniDV is routinely used by broadcasters for ENG and special assignments. Being a digital format it is ideally suited to non linear computer editing with virtually lossless quality across multiple generations. Digital camcorders using the MiniDV format are the smallest and lightest available with their tapes being a similar size to a matchbox. The main difference between consumer and professional equipment is the quality of the lens, type and number of CCD's and the additional manual features built into the professional kit. The best quality MiniDV equipment can produce results which better BetaSP equipment which until recently was the broadcast standard. We stock the full range of MiniDV tapes from all the top manufactueres. JVC, SONY, PANASONIC, FUJI. For quantity orders over 100 pcs please contact us for prices.
HDD
 A hard disk drive ( HDD , or also hard drive ) is a non-volatile data storage device that stores data on a magnetic surface layered onto hard disk platters.
A hard disk uses rigid rotating platters (disks). Each platter has a planar magnetic surface on which digital data may be stored. Information is written to the disk by transmitting an electromagnetic flux through an antenna or read-write head that is very close to a magnetic material, which in turn changes its polarization due to the flux. The information can be read by a read-write head which senses electrical change as the magnetic fields pass by in close proximity as the platter rotates.
A typical hard disk drive design consists of a central axis or spindle upon which the platters spin at a constant rotational velocity. Moving along and between the platters on a common armature are read-write heads, with one head for each platter surface. The armature moves the heads radially across the platters as they spin, allowing each head access to the entirety of the platter.
A hard disk is generally accessed over one of a number of bus types, including ATA (IDE, EIDE), Serial ATA , SCSI , SAS, FireWire (aka IEEE 1394), USB , and Fibre Channel .
CD-R Quality
 Low CD-R media prices, unknown CD-R vendors, conflicting claims by these vendors, then there are the green / gold / blue dye's and gold / silver metallizations. All this information is very confusing to the CD-R buyer. Users just want quality CD-R's for a low price but usually this does not mix... There are a lot of these low budget CD-R's on sale everywhere but no-one can really tell what the quality of these CD-R's is and will be the impact of ageing is on the CD-R's. Some people think that CD-Recordable media will last as long as any normal CD but this is not true! In early 1999 a few computer magazines in Europe featured a very interesting article on the quality of CD-R's. In this article a total of 170 CD-R's (17 brands, 10 per brand) were subjected to a test and the results varied a lot. Some CD-R manufacturers claim that they have quality CD-R media just by testing the compatibility with all kind of CD-Writers. Let's be clear: Compatibility does not equal Quality!
The quality of CD-R's is directly related with the time the CD-R's will last without losing the information on them. The second important issue is that the CD-R can be used on any kind of CD-Reader without any problems.
One of the solutions to test the quality is to write a few CD-Rs, then wait about 25-50 years and check if the CD-R's still hold the correct data. This is ofcouse a bit extreme.
A better solution is to use the CATS CD-R/CD-RW Analyzer which is made by Audio Development . This company is market-leader in supplying reliable automated test systems for all CD & DVD media. The CATS Analyzer is a complete hardware & software test solution which is build around the Philips CDM4 Optical Drive. This drive is specially designed to retrieve very accurate information from a CD.
MiniDisk
 MiniDiscs come in two forms:
- Pre-recorded
- Blank and recordable
A pre-recorded MiniDisc is exactly like a CD, except smaller. CD holds about five times more data (650 megabytes in data mode and 740 megabytes in audio mode) than a MiniDisc. However, both CDs and MiniDiscs can store the same amount of music (75 minutes or so). The difference is that a MiniDisc uses a digital compression technique called ATRAC (Adaptive Transform Acoustic Coding) when storing music.
The ATRAC technique compresses the data by a factor of about 5 to 1. ATRAC is a "lossy" compression algorithm , meaning that it changes the music very slightly upon decompression. This modification is not noticeable to a "normal" person (and is so much better than a cassette tape that the two cannot even be compared), but audiophiles have never liked this fact and it has consistently tainted the image of the MiniDisc.
A recordable MiniDisc is a magneto-optical device capable of storing 140 megabytes of information. Music can be scattered all over the disk and the player can "put it together" correctly when playing the disk. This means that you can erase and re-record songs on a MiniDisc without having to worry about how they fit together. This is tremendously convenient compared to a cassette tape, where you have to basically re-record the entire tape if you want to change any of the songs on it. There are also 4-track MiniDisc recorders for musicians, which are great for recording songs as they are performed and then mixing the tracks.
Iomega ZIP 250 USB Host Powered
Tired of all 1.44 MB floppies on which you can't store your MP3s, documents, videos and other huge things? If so you surely have to buy a ZIP 250 drive! The disks used by this drive can contain the equivalent of 170 traditional floppies! Since the introduction of ZIP drives in 1996, Iomega has sold millions of products around the world and its ZIP format has became a kind of standard used by computer professionals as well as home users. Unlike the LS120 drives or the ghostly Sony HiFDD 200 MB drive, a ZIP 250 drive is already bundled with many computers: one more proof of its standardization. Iomega has recently added a new model to is line of ZIP 250 drives: the ZIP 250 USB Host Powered. This new ZIP drive that uses USB connection is slightly faster than the old parallel port model, and is intended to all of you who need to transfer, store or exchange files on the run, while using those large capacity ZIP disks of 250 MB. The main new feature of this model is that it doesn't need any AC-Adapter! Here is our review of this great addition for every PC.
 Features List
Here are the key features of the Iomega ZIP 250 USB Host Powered drive :
- Ultra-thin, mobile design.
- Compatible with USB-enabled PC and Macintosh systems.
- Requires MacOS 8.1 or higher, or Windows 95, Windows 98, Windows Me, Windows 2000 or Windows NT 4.0.
- Hot plug and play, except Windows NT 4.0.
- Up to 900KB/sec transfer rate.
- Includes IomegaWare 2.8 with the latest software advancements from Iomega
- Compatible with both 100MB and 250MB Zip disks.
- Compatible with more than 150 million 100MB Zip disks shipped to date.
- Competitively price at $179. 95 (estimated street price).
WD2500KS SATA HDD
 Those of us who are always looking for the bigger, better and faster storage solutions have the end in sight. Lately, more and more SATA enhanced 3.0Gb/s drives are hitting the market. Western Digital one company offering solutions to those of us who aren't satisfied with second rate speeds, those of us with large home movies, and those of us who store everything we can find on a computer that sits in the corner with dust bunnies the size of basketballs. Enter the Western Digital Caviar SE16 WD2500KS hard drive.
If you remember, IDE took the road map that older processors were following. The old 33 increase: 33MB/s, then to 66 and so on; currently maxing out at 133MB/s. If you haven't guessed yet from reading our articles here, THAT ISN'T FAST ENOUGH! WE NEED SPEED. Already with SATA you have seen a theoretical double in speed from SATA 150 to SATA 3.0Gb/s. I can assume that this pace will not keep up, although SATA-io.org plans on rolling out specs up to 600MB/s or higher over the next 10 years, but I welcome the performance increase now.
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FLASH MEMORY 