Computer Usage Basics 001

• If time/clock on computer is not working, change a small lithium battery inside.
• Failures in computer - harddisk +9, monitor +7, smps +4, cdrom drive +2, motherboard +1.
• Use a ball less optical mouse, with scroll wheel, ps2 or USB.
• When you buy a PC, ensure it has a harddisk light, power on light, reset, sleep, start buttons.
• PC monitor supports 1024*768, pc - 4 USB ports, 1 serial, 1 parallel, 2 ps2, PCI slots.
• Hard disk should be partitioned into drives, improves performance and is manageable.
• Refresh your browser is some sites or else you will see what is stored cache.
• Csv is a text file, storing data, comma separated, like name,job,age,city,country.
• Symbol ' is for feet " is for inches,
• Another data format is pipe separated name|job|age|city|country.
• Backup data and configuration of every software you use to another folder every day.
• Windows F1 function key is for help, or use help menu or see readme.txt in folder.

Acronyms in Technology

SQL	structured query language	database language, foundation, used in informix mysql and ADO.
ODBC	open data base connectivity	this enables programs to connect and use a database.
LAN	local area network	computer can transfer files, intranet, communication, web applications.
FSK	frequency shift keying	used in modems to modulate the binary data to feed over phone lines.
MODEM	modulator-fsk, demodulator-pll vco.	modem transmits and recives modulated binary data over phone/cable.
USB	universal serial bus	many peripherals of computers use this, 500mA power, hot plug.
HTML	hyper text markup language	text used to make webpages, browser reads this to compose the webpage.
HTTP	hyper text transfer protocol	an internet standard to transfer files from server to client computer.
FTP	file transfer protocol	used to upload and download files from ftp servers ftp://ftp.cdrom.com/
POP	post office protocol	pop3 used to get mail from a server smtp used for sending, imap too.
WWW	world wide web	a subset of internet wowen thru hyperlinks and uses the http:// protocol.
XML	extensible markup language	database format like csv or sql more powerful, flexible and internet capable.
URL	uniform resource locator	like http://www.apple.com/mac/index.html, as it is easier than numbers.
OCR	optical character recognition	used in scanners, extracts text from images, needs uniform back and font.
MOV	metal oxide varistor	in SMPS, and power supplies, protects against micro second voltage surges.
CASE	computer aided software engineering	automation of software design and development using some applications.