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A liquid-crystal display (LCD) is a flat panel display, ele visual display, or video displa y that uses the light modulating properties of liquid display. Liquid crystals do not emit light directly.

LCDs are available to display arbitrary images (as in a general-purpose computer display) or fixed images with low information content which can be displayed or hidden, such as preset words, digits, an 7-segment displays as in a digital clock. They use the same basic technology, except that arbitrary images are made up of a large number of small pixels, while other displays have larger elements.

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1. Sharpness
The CRT's Gaussian beam profile produces images with softer edges that are not as sharp as an LCD at its native resolution. Imperfect focus and color registration also reduce sharpness. Generally sharper than LCDs at other than native resolutions.

2. Interference
All color CRTs produce annoying Moiré patterns. Many monitors include Moiré reduction, which normally doesn't eliminate the Moiré interference patterns entirely.

3. Geometric Distortion
Subject to geometric distortion and screen regulation problems. Also affected by magnetic fields from other equipment including other CRTs.

4. Brightness
Relatively bright but not as bright as LCDs. Not suitable for very brightly lit environments.

5. Screen Shape
Some CRTs have a rounded spherical or cylindrical shape screen. Newer CRTs are flat.

6. Emissions
CRTs give off electric, magnetic and electromagnetic fields. There is considerable controversy as to whether any of these pose a health hazard, particularly magnetic fields. The most authoritative scientific studies conclude that they are not harmful but some people remain unconvinced.

7. Physical
They are large, heavy, and bulky. They consume a lot of electricity and produce a lot of heat.

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The Solid State Disk price per gigabyte is much higher than hard drives, so an upgrade to the same GB capacity can incur some considerable costs.While they are able to withstand movement, they are vulnerable to power loss and electrical/magnetic currents much in the same way as flash cards.Currently there are very few large capacity SSD models, though this is expected to change drastically over the course of the next few years.Flash SSD have limited write cycles. It is estimated that these write cycles will last until long after the computer is still being used, it is possible that some files could use write cycles often enough that it affects the owner/user.Despite requiring less power, many SSD still use more power than the standard hard drive, especially when idle. This can cause laptop batteries to use up more quickly.

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The Solid State Disk price per gigabyte is much higher than hard drives, so an upgrade to the same GB capacity can incur some considerable costs.While they are able to withstand movement, they are vulnerable to power loss and electrical/magnetic currents much in the same way as flash cards.Currently there are very few large capacity SSD models, though this is expected to change drastically over the course of the next few years.Flash SSD have limited write cycles. It is estimated that these write cycles will last until long after the computer is still being used, it is possible that some files could use write cycles often enough that it affects the owner/user.Despite requiring less power, many SSD still use more power than the standard hard drive, especially when idle. This can cause laptop batteries to use up more quickly.

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HDDonsumes alot of power, the resistance of shocks is low, data error rates are frequent, weight ratios are large, the size is large, can be hard to recover data from, (SCSI) controller cards may be required, loud mechanical noise can be generated, heat can be generated, there are moving parts inside, the disk sectors will eventually stop working, and they can be broken if dropped (usually whilst operating). The speed of the Hard drive speed (MBS) can regulate the data transfer rate of the computer. If the jumper settings are not precise the hard drive may become fried. If you have a hard drive which is older you may find it hard to find the hardware drivers for it. Also if you have a hard drive which is older it may cause data to be corrupted on your computer and you may lose your data because of faulty transfer to/from the disk platters.

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Inkjet printer

If you need a printer to just print basic documents, with or without color, like a Word document, Excel spreadsheet, Web page, or an E-mail message, a document printer is adequate for the job. The inkjet printer is the least expensive of the three types, typically priced under $100.

If you are interested in printing photos up to 8 x 10 in size and needs the photos to be high quality, the photo printer is the best option. Most photo printers can print relatively high resolution photos and can many times look just as good as a photo developed and printed by a professional photo printing business.

If you need the ability to make copies of documents and scan documents or photos into a computer, as well as print documents, the All-in-One printer is the best choice. Some All-in-One printers may also even have fax capabilities and document feeders built-in as well, allowing the user to copy a multi-page document, just like a large copy machine.

Inkjet Pros & Cons

With Inkjet printers, there are pros & cons to owning and using one.

The Pros include:

Smaller Size - most Inkjet printers are relatively small and can fit in tight spaces. All-in-One Inkjet printers are a bit larger but are still typically smaller than a laser printer and much smaller than a standard office copy machine.

Low Cost - Inkjet printers, overall, have lower sticker prices than laser printers. When the time comes, they are also cheaper to replace since it is often easier and cheaper to just buy a new printer if it breaks down.

Cheaper Ink cartridges - ink cartridges for Inkjet printers have become cheaper in price in the last few years. Often ink is half the price of a laser toner cartridge.

Easier to replace cartridges - replacing ink cartridges in an Inkjet printer is quick and easy to do.

Excellent photo quality - Inkjet printers geared towards photo printing can produce amazing results, printing pictures with vivid colors, high contrasts, and virtually no pixelation. There is almost no need to go to a professional photo printer to have your photos printed.

The Cons include:

Less efficient ink use - Inkjet printers have a higher cost per page when it comes to printing, due to their rather inefficient usage of ink. When compared to Inkjet printers laser printers are much more efficient with their toner.

Slower printing of large documents - printing a document with multiple pages takes a bit longer on an Inkjet printer than a laser printer.

Messy to clean - cleaning an Inkjet printer is no easy task, nor is it a clean one. Inkjet cartridges can sometimes leak, and the ink can stain almost anything it comes in contact with, including clothes and hands.

Overall, Inkjet printer is the most common choice for consumers. When visiting an electronics store, it is common to see a larger selection of Inkjet printers than laser printers. Nowadays, consumers look for good quality printing at the lowest initial cost and Inkjet printers fits that criteria. Hewlett Parckard and Canon  have proven to be reliable brands with models that fit the needs of most consumers.

Laser printer

There are two types of Laser Printers available:

Basic document printer

Copier/Scanner/Printer (All-in-One)

If you only need to print documents, like a Word document, Excel spreadsheet, or a web page, the basic laser printer is a good option. Laser printers at the lower end of the price scale are just black & white. There are color laser printers as well, but they have a higher price tag, often several times higher.

If you are looking to be able to make copies of documents, scan a document to a computer, and print documents, the All-in-one laser printer is a good choice. As with the basic laser printer, the majority of All-in-One versions are black & white. Laser color printers are available but are higher priced.

Laser Printer

With laser printers, there are pros & cons to owning and using one.

The pros include:

More efficient use of toner - a laser printer is efficient on toner use, compared to Inkjet printer usage of ink. A laser printers cost per page can be considerably less, which means a total lower cost of ownership over the life of the printer.

Faster print speeds - a laser printer can print documents quite fast, especially larger documents, when compared to an Inkjet printer.

Less mess to clean up - toner does not stain like ink and cleaning a laser printer is not the messy as an Inkjet printer.

Excellent print quality - a laser printer can produce excellent print quality, both black & white, as well as color. Printed documents, with or without color, look very sharp, usually more than the same documents printed on an inkjet printer.

CONS

Higher toner cartridge cost - toner cartridges do cost more than Inkjet cartridges, sometimes twice as much. However, they last much longer than Inkjet cartridges.

Larger physical size - while laser printers have gotten smaller in size over the years, they are still typically a bit bulkier than an Inkjet printer and don't fit into the tight spaces as easily, if at all

Can be noisy - laser printers are not known for their quiet operation. They are known to be louder when in use and can sometimes be a disruption or annoyance when trying to talk to someone in person or on the phone.

High cost for color - laser printers are not common choices for consumers who want to print photos or even color in general. They are pricier and while they can print excellent quality color, most consumers opt for an Inkjet printer due to the lower price.

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Photoshop's limitations are constantly decreasing as it continues to update, before in the earlier versions - there were many things you couldn't do, such as 3D imagery and other extra overlays to enhance your photo.

Photoshop's limitations have dramatically dropped.

Also Photoshop undergone optimizations as well, decreasing the capacity of how much RAM is used while undergoing Photoshop's operations, and also increasing the speed of which this can be done at. You could consider Photoshop's limitations to practically be sparse, and it's only decreasing in today's society.