Discovering Computers: 2014 Edition Chapter 7 Notes

If an employee enters a room by swiping a card on a reader, what type of technology is used? (A) OCR, (B) RFID, (C) MICR, (D) OMR

(B) RFID

What does HDMI stand for?

Abbreviation of high-definition multimedia interface. A standard for connecting high-definition video devices.

FYI, Old TVs were 480i.

FYI, Some new TVs are 720p, 1080i, and 1080p.

True or False. An old fashioned TV used progressive scan and had an aspect ratio of 16:9.

False. Old fashioned TVs used interlacing and had aspect ratios of 4:3

What is the difference between an ink-jet printer and a laser printer? (Lecture Notes version)

Ink-jet printers use droplets of ink to form letters on paper. Laser printers use a metal drum, toner, and a laser to stamp letters on paper.

What is the difference between a ink-jet printer and a laser printer? (Chapter Notes version)

Inkjet printers use liquid ink sprayed through microscopic nozzles onto the paper, and laser printers use a toner cartridge (filled with fine powder) and a heated fuser. Each technology has its own strengths and weaknesses.

What does the "i" and the "p" in 1080i and 1080p stand for?

Interlaced (i) and Progressive (p). Interlaced was used in old TVs. Half of the picture was sent first, and then a moment later the other half was sent. Progressive is used in new TVs. All of the picture is sent at the same time.

What does LCD stand for?

LCD stands for "liquid crystal display" and technically, both LED and LCD TVs are liquid crystal displays. The basic technology is the same in that both television types have two layers of polarized glass through which the liquid crystals both block and pass light. So really, LED TVs are a subset of LCD TVs.

What does LCR stand for?

Liquid Crystal Response

What does MICR stand for?

MICR is an acronym for Magnetic Ink Character Recognition. It is the automation concept used by the banking industry. Every negotiable document, like checks and money orders, has a unique style of numbers and symbols with magnetic properties. The 1st set of numbers is the ABA Bank Routing Number. The 2nd set of numbers is the Account Number. The 3rd set of numbers is the Check Number. The 4th set of numbers is the Amount of the check.

What does OCR stand for?

OCR is the acronym of Optical character Recognition. PDF documents and image formats that contain text are not text-searchable. By using OCR, they can be converted into text-searchable documents.

What is the difference between OCR (Optical Character Recognition) and OMR? (Optical Mark Recognition)

OCR recognizes individual characters such as the character "d" in the word "dog". OMR recognizes marks such as the marks you make on a ScanTron.

What does OMR stand for?

OMR stands for optical mark reader, which is a device that scans, checks and records the pencil marks on a form designed to be compatible with the device. Examples of applications for optical mark recognition technology include surveys, test questionnaires, response cards and ballots.

Which technology can read answers written with a #2 pencil?

Optical Mark Recognition

Information on Printers:

Printers: ppm (pages per minute) [describes printer speed], dpi (dots per inch) [a measure of printing resolution], overall costs (i.e. cost of printer, toner, ink, paper, etc.). Ink-jet printers are mainly for home use. Laser printers are mainly for business or enterprise use (i.e. GCC).

What is a QR code and what does it stand for?

QR code (abbreviated from Quick Response Code) is the trademark for a type of matrix barcode (or two-dimensional barcode) first designed for the automotive industry in Japan. A barcode is a machine-readable optical label that contains information about the item to which it is attached.

What does RFID stand for?

RFID stands for radio frequency identification, and it is becoming a popular addition to modern day credit cards. These "smart cards" are supposed to be more convenient than traditional credit cards because you do not have to swipe them to use them. The RFID chips are very small and there are many different readers that can detect them.

What are some common resolution dimensions and which number is the width and which number is the height?

Some common resolution dimensions are 1920 x 1080, 1600 x 900, and 1024 x 768. The 1st number is the width and the 2nd number is the height. For example, 1920 is the width and 1080 is the height.

What is ADA?

The Americans with Disabilities Act of 1990 is a US labor law that prohibits unjustified discrimination based on disability. The ADA says you must provide "reasonable" access, facilities, and machinery if you have a business with "15 or more" employees.

What are the Aspect Ratios of an old tv screen, a old movie theater screen, a modern tv screen, and a modern movie theater screen?

The Aspect Ratios of all four items are listed below: Old TV Screen: 4x3 Old Movie Theater Screen: 4x3 Modern TV Screen: 16x9 Modern Movie Theater Screen: 16x9

How do you remember the difference between Interlaced (i) and Progressive (p)?

Think of interlaced hands. Interlaced = half then other half or one hand then other hand.

How do you remember [Ctrl] + V is Paste?

Think of someone relocating a tree. They pick up the tree and all of its roots using a special machine, and plant it somewhere else. The tree relocation machine's bottom is shaped like a "V".

How do you remember [Ctrl] + Z is Undo?

Think of someone who is texting while driving. That someone is driving down the road, and then he/her receives a text message. He/Her responds to the text message and, while he/her is responding, he/her starts to drift out of his/her lane. He/her realizes that he/her is starting to drift out of his/her lane, and he/her corrects himself/herself; resulting in a "Z"-shaped skid mark.

How do you remember [Ctrl] + K is Hyperlink?

Think of the letter "k" in the word "Link". Link is the last part of the word Hyperlink.

How do you remember [Ctrl] + H is Replace?

Think of the word "cHange". Another word for Replace is "cHange". "cHange": c = [Ctrl] H = H.

True or False. Ink-jet printers are the cheapest to operate.

This might be true, but it might be false. It depends on the situation. For large volume users, such as GCC, a laser printer might be cheaper overall because tone is cheaper on a per page basis. For home users, an ink-jet printer is usually, although not always, cheapest overall.

What are the following keyboard shortcuts used for? [Ctrl] + C [Ctrl] + P [Ctrl] + V [Ctrl] + U

[Ctrl] + C (Copy) [Ctrl] + P (Print) [Ctrl] + V (Paste) [Ctrl] + U (Underline)

[Ctrl] + C [Ctrl] + P [Ctrl] + V [Ctrl] + U [Ctrl] + S [Ctrl] + A [Ctrl] + X [Ctrl] + B [Ctrl] + I [Ctrl] + F [Ctrl] + H [Ctrl] + K [Ctrl] + Z

[Ctrl] + C (Copy) [Ctrl] + P (Print) [Ctrl] + V (Paste) [Ctrl] + U (Underline) [Ctrl] + S (Save) [Ctrl] + A (All - Select) [Ctrl] + X (Cut) [Ctrl] + B (Bold) [Ctrl] + I (Italics) [Ctrl] + F (Find) [Ctrl] + H (Replace) [Ctrl] + K (Hyperlink) [Ctrl] + Z (Undo)