Summarizing a 1.44 MB floppy
Two sides or surfaces (or heads)
80 tracks or cylinders per side.
18 sectors per track
0.5K (512 Bytes) per sector
2 X 80 X 18 X 0.5K = 1.44 MB by
HARD DISK CARE &
1. STABLE POWER SUPPLY
2. PROPER SHUT DOWN
3. KEEP AWAY FROM STRONG ELECTRIC
AND MAGNETIC FIELD
4. PREVENT FROM SHOCK/VIBRATION
5. CARE WHILE MOVING
6. PREVENT FROM DUST/MOISTURE
7. NO USER SERVICEABLE PARTS
8. MAINT TOOLS/UT
Simple Technologies to
Improve Your Business
The College of William & Marys
Mason School of Business
The Technology & Business Center
The City of Williamsburg
Williamsburg Community Center
7 December 2006
Data Analysis & Webs
WHAT IS A CMPTR?
CMPTR CAN BE DEFINED AS
AN ELECTRONIC DEVICE THAT
ACCEPTS DATA, PROCESSES
INFORMATION IN A PREDEFINED
FASHION, ACCORDING TO THE
SET OF INSTRUCTIONS PROVIDED
TO IT AND PRODUCES THE
DESIRED OUT PUT.
A computer is:
AGALE EK PERIOD KE
DOWRAN ELEMENTS OF
COMPUTER HARDWARE KE
BARE MAIN JANKARI HASIL
WHAT IS A CMPTR
CMPTR CAN BE DEFINED AS AN
ELECTRONIC DEVICE THAT ACCEPTS
DATA, PROCESSES INFORMATION IN A
PREDEFINED FASHION, ACCORDING
TO THE SET OF INSTRUCTIONS
Building a Computer (Step-By-Step)
by Ryan Wissman : May 5, 2000
Building your own homegrown computer is not only a valuable skill to posses, but it is also a very
simple one to learn and understand. Think of today's modern computer parts like Legos.
Accessible to CPU w/o use of cmptrs I/O
Used to store data in active use.
Large scale use impractical.
Short term storage.
RAM, ROM, Cache, Registers.
Stores data a
WHAT IS A CMPTR?
Cmptr can be defined as an electronic device that
accepts data, processes information in a predefined fashion,
according to the set of instructions provided to it and produces
the desired out put.
A programmable machine. The two principal
Device that is capable of representing information
from a computer is called an output device
There are three important output devices
connected to the system unit:
Some of the important computer input devices
Used to point to and select options displayed on
Connected to the system unit by means of a
INTRO TO BIOS & CMOS
BIOS stands for Basic Input Output
The BIOS (Basic Input/Output System) is
the basic controller that allows all of the
components that make up a computer
system to talk to one another.
Introduction to Microsoft Access
Good for calculations
You are very familiar with it
But just because you know how to
use a hammer the whole world is
NOT a nail
Examples of problems
Select all the people with brown hair, high bloo
Microsoft Access Basics
Identify the need for DBMS
List the components of a database
List the features of Microsoft Access
Identify parts of the Access interface
Create and save a database
Open and close an existing database
OS KE KAAM
Operating System Evolution
The most-used output device on a computer.
Most desktop displays use a cathode ray tube
Laptops use liquid crystal display (LCD), and gas
plasma or other image projection technology.
Latest revolution in display technology is t
WHAT IS SCANNER
A scanner converts photographs to digital image
files that can be stored on the hard disk of a
Scanner, a computer input
device that uses light-sensing
equipment to scan paper or another
medium, translating the pa
Access Tutorial 13: Event-Driven Programming
13.1 Introduction: What is eventdriven programming?
the order entry is complete, the inventory update
module is executed, and so on.
In conventional programming, the sequence of operations for an a
As you save, erase, and move files sometimes
things do not go just right. This is not caused
by anything you are doing wrong. A PC is a
very complex, fast machine and despite the
best efforts of all the designers, engin
Additional memory, called auxiliary
memory or secondary storage, is used
with most computer systems.
Characterised by low cost per bit
stored, but it generally has an
operating speed far slow than that of
BACKUP REFERS TO MAKING
COPIES OF DATA SO THAT THESE
ADDITIONAL COPIES MAY BE USED
TO RESTORE THE ORIGINAL
AFTER A DATA LOSS EVENT. THESE
ADDITIONAL COPIES ARE
TYPICALLY CALLED "BACKUPS."
Backups are useful primarily for
The first is to res
WHAT IS A HARD DISK PARTITION
A hard disk partition is a defined storage
space on a hard drive.
Most operating systems allow users to divide
a hard disk into multiple partitions, in effect
making one physical hard disk into several
smaller logical hard
HOW TO INSTALL A LOCAL
Click Start, Settings, Control Panel.
Double-click "Printers & Faxes"
Double-click "Add Printer" to start the
Add Printer Wizard
The Add Printer Wizard Welcome screen .
Local or Network Printer
Forms and Subforms
Create a Form
A form is a type of a database object that is primarily
used to enter or display data in a database.
Most forms are bound to one or
C+: a language for all
Program Manager, Visual C+
* With apologies to Robert Bolt
Languages could/should evolve, for a
variety of reasons
Support different programming paradigms
Support different abstractions and facil
2 Types: SCSI and IDE
IDE drives originally developed as alternative to more expensive
Modern versions called EIDE drives.
Support up to 4 multigigabyte drives.
If you want more devices, use