BASIC SCIENCE
&
ENGINEERING DRAWING
IT – LITERACY
NK RAILWAY PSYCHO CLASSES
ABHISHEK SIR NOTES
CHAPTER- 1
I
H
P
A
1
1
1 1 1
1
1
1
G C
ENIAC
IB
IB
1
P S
RA RO CACHE
NITS O E ORY
S ALLEST NIT BIT BINARY DIGIT
BIT 1 NIBBLE
BIT 1 BYTE
1 BYTE 1 KB KILO BYTE
1 KB 1 B EGA BYTE
1 B 1 GB GIGA BYTE
1 GB 1 TB TERA BYTE
1 TB 1 PB PETA BYTE
1 PB 1EB E A BYTE
1 EB 1 B ETTA BYTE
1 B 1YB YOTTA BYTE
1 ILLION BYTE 1 B
1 BILLION BYTE 1 GB
1 TRILLION BYTE 1 TB
E ORY
1- P
CP
GB
N
ON
N -
RA
DRA
SRA
RO
EEPRO RO
CACHE E ORY
HDD
HDD
HDD
HDD
HDD
HDD
HDD
C D
BD
INP T DE ICES
KEYBOARD TO CH SCREEN
O SE DIGITAL CA ERA
TRACKBALL ICROPHONE
OYSTICK S ART CARD READER
LIGHT PEN GRAPHICS TABLET
SCANNER IDEO CAPT RE CA ERA
OCR BCR
O R ICR
A
ALPHABETIC KEYS N ERIC KEYS
1- 1 NA IGATION KEYS
NCTION KEYS
SE O NA IGATION KEYS
LE T ARROW KEY O E THE C RSER ONE LETTER LE T
CTRL LE T O E THE C RSER ONE WORD LE T
RIGHT ARROW KEY O E THE C RSER ONE LETTER RIGHT
CTRL RIGHT O E THE C RSER ONE WORD RIGHT
P ARROW KEY O E THE C RSER ONE LINE P
CTRL P O E THE C RSER ONE PARAGRAPH P
DOWN ARROW KEY O E THE C RSER ONE LINE DOWN
CTRL DOWN O E THE C RSER ONE PARAGRAPH DOWN
IT IS A POINTING DE ICE POINT AND DRAW DE ICE
LE T CLICK TO E EC TE PROGRA
RIGHT CLICK TO CHECK PROPERTY
DO BLE CLICK TO OPEN A ILE OLDER
SCROLL TO SCROLL P & DOWN LE T & RIGHT
DWAG AND DROP
IT IS A POINTING DE ICE
IT IS ALSO KNOWN AS P SIDE DOWN O SE
IT IS A POINTING DE ICE
IT IS SED OR GA ING
IT IS A POINTING DE ICE
IT IS ALSO KNOWN AS ELECTRONIC PEN
SE TO DIRECTLY INP T DATA
IT IS SED TO SCAN DOC ENTS IN PICT RE OR AT
BCR BAR CODE READER
ICR EGNETIC INK CHARACTER RECOGINITION
OCR OPTICAL CHARACTER RECOGINITON
SE TO READ CHARACTER RO SCANNED DATA
OPTICAL ARK READER
TO READ SHADED PART
O TP T DE ICES
ONITOR D
PRINTER
PLOTTER
SPEAKER
PRO ECTOR
IS AL DISPLAY NIT
IT IS A SO T COPY O TP T DE ICE
PI CELS
P E
RESOL TION
PRO IDE O TP T IN THE OR O A DIO
SE OR LARGE SCALE PRINTING
1 ORTAN OR LA TRANSLATION
S E S
L E - L
E
HT L E H T L
GA E G A
WWW W W W
W L W L
1 WLAN WIRELESS LOCAL AREA NETWORK
WI- I WIRELESS IDILITY
WB P WIRELESS BIT AP I AGE
WAP WIRELESS BIT AP I AGE
WAN WIDE AREA NETWORK
D IRT AL E TENDED DRI ER
RA IDEO RANDO ACCESS E ORY
IR S I R S
S-O ICE
S WORD S E CEL S PPT
PRI ERY NA E
ILE NA E
E TENSION NA E
S E CEL
C
A I
1 A TO D
IN ONE CELL A CHARECTERS
A
A -
A
T 1
E
E
A
C
C
C T
A
C 1
1
C
C
C
P
C
C
P
B
I I
1
11
1
T
B
L
C
R
W
C
S
C
S 11
N
1 D
B
O
H
1-D N S
-B N S
-O N S
-H N S
-H N S
N
B D E
S
1
D 1 1
B 1 1 11 11 1
O 1 1 1
1
H 1 A B C D 1A C
E
B
D
B
O
B
H B
O
D
H
O
H
1 AT A TO ETED TELLER ACHINE RRB NTPC 1
S S SHORT ESSAGE SER ICE RRB NTPC 1
ICT IN OR ATION AND CO NICATION TECHNOLOGY RRB NTPC
PDA PERSONAL DIGITAL ASSISTANT RRB NTPC 1 1
TP ILE TRANS ER PROTOCOL RRB NTPC 1
DASD DIRECT ACCESS STORAGE DE ICE RRB NTPC 1 1
ASCII A ERICAN STANDARD CODE OR IN OR ATION E CHANGE
1 ORTAN OR LA TRANSLATION
S E S
L E - L
E
HT L E H T L
GA E G A
WWW W W W
W L W L
N R P C
I N -1 P B &E
D L 1 RRB ALP CBT-
N R P C
I N -1 P B &E
D L 1 RRB ALP CBT-
AND
N R P C
I N -1 P B &E
D L 1 RRB ALP CBT-
AND Y AB
A B Y
AND
A B Y
1
1
1 1 1
I N -1 P B &E
D L 1 RRB ALP CBT-
OR
N R P C
I N -1 P B &E
D L 1 RRB ALP CBT-
OR
Y A B
Y A OR B
OR
A Y
1 1
N R 1
P1 C11
I N -1 P 1 B &E
D L 1 RRB ALP CBT-
I N -1 P B &E
D L 1 RRB ALP CBT-
NOT Y NOT A
Y NOT A
NOT A
A1 Y
A Y
N R 1
P 1
C
I N -1 P B &E
D L 1 RRB ALP CBT-
OR
N R P C
I N -1 P B &E
D L 1 RRB ALP CBT-
OR
A
1 1
1 1
1 1
I N -1 P B &E
D L 1 RRB ALP CBT-
NOR
N R P C
I N -1 P B &E
D L 1 RRB ALP CBT-
NOR
A
1
1
1
N R 1 P 1 C1
I N -1 P B &E
D L 1 RRB ALP CBT-
NAND
I N -1 P B &E
D L 1 RRB ALP CBT-
NAND
A
1
1 1
1 1
N R1 P1 C
I N -1 P B &E
D L 1 RRB ALP CBT-
NOR
THANK -
YOU
