Science and Technology: knowledege about keyboard

Science and Technology: knowledege about keyboard: Q. 1 who invented keyboard? ans: Christopher Latham Sholes (February 14, 1819 – February 17, 1890) was an American inventor who invented t...

knowledege about keyboard

Q. 1 who invented keyboard?
ans: Christopher Latham Sholes (February 14, 1819 – February 17, 1890) was an American inventor who invented the first practical typewriter and the QWERTY keyboard still in use today.
Q.2 What is keyboard in computing?
Ans: In computing, a keyboard is a typewriter-style device, which uses an arrangement of buttons or keys, to act as mechanical levers or electronic switches. Following the decline of punch cards and paper tape, interaction via teleprinter-style keyboards became the main input device for computers.
Q.3 what are the types of keyboard?
ans: 1.82-key Apple standard keyboard
2.108-key Apple Extended keyboard
3.101-key Enhanced keyboard
4.104-key Windows keyboard.
Q.4 what are the basic type's of keys?
Ans: 1.Function keys
2.Typing keys
3.Numerical keys
4.Control keys

Basic info about WI-FI networks

SOME BASIC INFO ABOUT WI-FI........
1. wifi is basically known as wireless fidelity. wi-fi networks have range that's limited by the transmission power,antenna type,the location they r used in and the environment.
2.A wireless network enables people to communicate and access applications and information without wires. This provides freedom of movement and the ability to extend applications to different parts of a building, city, or nearly anywhere in the world. Wireless networks allow people to interact with e-mail or browse the Internet from a location that they prefer.
3.FOUNDER OF WI-FI :Terence Percival ,john Deane,Diethelm Ostry,
and Graham Daniels 
4.TYPES OF WIRELESS NETWORKS.
WLANS: Wireless Local Area Networks
WLANS allow users in a local area, such as a university campus or library, to form a network or gain access to the internet. A temporary network can be formed by a small number of users without the need of an access point; given that they do not need access to network resources.
WPANS: Wireless Personal Area Networks
The two current technologies for wireless personal area networks are Infra Red (IR) and Bluetooth (IEEE 802.15). These will allow the connectivity of personal devices within an area of about 30 feet. However, IR requires a direct line of site and the range is less.
WMANS: Wireless Metropolitan Area Networks
This technology allows the connection of multiple networks in a metropolitan area such as different buildings in a city, which can be an alternative or backup to laying copper or fiber cabling.
WWANS: Wireless Wide Area Networks
These types of networks can be maintained over large areas, such as cities or countries, via multiple satellite systems or antenna sites looked after by an ISP. These types of systems are referred to as 2G (2nd Generation) systems.

Database basic information

Q.1 What is database?
Ans: A database is basically a collection of information organized in such a way that a computer program can quickly select desired pieces of data. database consist of fields and records.
Q.2 who is the father of database?
Ans: Edgar Frank "Ted" Codd.
Q.3 What is database management system(DBMS)?
Ans: Database management system is a collection of program that allow us to store ,modify and extract information from database.
Q.4 What is characteristics of DBMS?
Ans:1. Provide better security.
2. Controls data redundancy.
3. It has central dictionary.
4. Concurrent access and crash Recovery.
5. Data Independence.
6. Data Integrity.

7. Data administration.

some companies name and their full form

1. IBM
IBM’s full company name is International Business Machines Corporation. It is a multinational technology and consulting corporation. The company was founded in 1911 and headquartered in the United States.
2. TCS
TCS stands for Tata Consultancy Services Limited. It is considered to be one of India’s valuable company and a multinational information technology, services, business solutions and outsourcing .
3. .HTC
The Taiwanese manufacturer of of smartphones and tablets now known as HTC was founded with the name High Tech Computer Corporation. Initially a manufacturer of notebook computers, HTC began designing some of the world's first touch and wireless hand-held devices in 1998.

4. AT&T
An American multinational telecommunications corporation and the largest provider of both mobile telephony and of fixed telephony in the United States, American Telephone and Telegraph Company is often referred to as AT&T. The company also provides broadband subscription television services.
5. BMW
BMW is an abbreviation for Bayerische Motoren Werke. It is a German automobile, motorcycle and engine manufacturing company founded in 1917 which produces automobiles and motorcycles across all its brands. It also owns and produces the Mini marque, and Rolls-Royce Motor Cars.
6. BPL
The company commonly referred to as BPL stands for British Physical Laboratories. This Indian electronics company deals with consumer appliances, home entertainment products and health care devices. It was established in 1963, by MT P G Nambiar.
7. BEML
The full and original name of BEML is Bharat Earth Movers Limited. Headquartered in Bangalore, the company is an Indian Public Sector Undertaking and manufactures a variety of heavy equipment, such as that used for earth moving, transport and mining.
8. BHEL
BHEL is based in New Delhi and is engaged in the design, engineering, manufacture, construction, testing, commissioning and servicing of a wide range of products and services for the core sectors of the economy. BHEL is an abbreviation for Bharat Heavy Electricals Limited.
9. ICICI
The financial services company, ICICI Bank is headquartered in Mumbai offers retail and corporate customers a wide range of banking products and financial services. Earlier, the bank was known as Industrial Credit and Investment Corporation of India Bank, it later changed its name to the abbreviated ICICI Bank.
10. HDFC
India’s largest mortgage company, HDFC was founded in 1977. The financial services company has over 300 outlets and caters to non-resident Indians as well. The full name of HDFC is Housing Development Finance Corporation Limited.
11. HCL
Headquartered in India, HCL is a global technology and IT Enterprise that operates in over 30 countries of the world. The company mainly focuses on the IT hardware market. HCL is the abbreviation for Hindustan Computer Limited.
12. L&T
L&T is India’s multinational conglomerate corporation which is headquartered in Mumbai. The company’s business includes technology, engineering, construction and manufacturing goods. L&T stands for Larsen & Toubro.
13. MRF
India’s major tyre manufacturing company, Madras Rubber Factory is popularly known as MRF. It is considered to be the largest tyre manufacturer in India which makes all types of tyres, from auto to sedan, bias to radial including tubes and conveyor belts
.
14. WIPRO
One of India’s most popular information technology firm, Wipro was formerly known as Western India Products Limited. The company’s operations include IT products and services, consumer care and lighting, healthcare and infrastructure engineering.
15. INTEL
The world’s largest chip maker, Intel’s full name is Integrated Electronics. The company makes motherboard chipsets, network interface controllers and integrated circuits, flash memory, graphic chips, among other products.
16. HP
The full name of one of the most popular information technology corporation, HP is Hewlett-Packard Company. The company provides products, technologies, software, solutions and services to consumers and other enterprises.
17. NASA
The National Aeronautics and Space Administration is popularly known as NASA. This United States government agency takes responsibility for space program, aeronautics and aerospace research.
18. P&G
The multinational consumer goods company, P&G’s full name is The Procter & Gamble Company. Over 20 brands of P&G’s brands have more than a billion dollars in net annual sales
19. CEAT
Mumbai based tyre manufacturing company, CEAT is an abbreviation for Cavi Elettrici e Affini Torino. CEAT tyres were founded in Italy by Virginio Bruni Tedeschi and the company established its manufacturing in India in 1958.
20.CNN
The Cable News Network is popularly referred to as CNN. This company is a cable news channel whose broadcast is seen by viewers in over 212 countries and territories. The cable network was launched in 1980.
trollers and integrated circuits, flash memory, graphic chips, among other products.

KB MB GB TB PB EB ZB YB

KB Kilobyte 1,024 Bytes 
MB Megabyte 1,048,576 Bytes 
Gb Gigabit 1 billion bits 
GB Gigabyte 1,073,741,824 Bytes | One billion Bytes 
TB Terrabyte 1024 GB, 1,048,576 MB, 8,388,608 KB, 1,099,511,627,776 Bytes and 8,796,093,022,208 bits. 
PB Pettabyte 1024 TB, 1,048,576 GB, 1,073,741,824 MB, 1,099,511,627,776 KB, 1,125,899,906,842,624 Bytes and9,007,199,254,740,992 bits.
EB Exabyte 1024 PB, 1,048,576 TB, 1,073,741,824 GB, 1,099,511,627,776 MB, 1,125,899,906,842,624 KB, 1,152,921,504,606,846,976 Bytes and 9,223,372,036,854,775,808 bits.
ZB Zettabyte 1024 EB, 1,048,576 PB, 1,073,741,824 TB, 1,099,511,627,776 GB, 1,125,899,906,842,624 MB, 1,152,921,504,606,846,976 KB, 1,180,591,620,717,411,303,424 Bytes and 9,444,732,965,739,290,427,392 bits
YB Yottabyte 1024 ZB, 1,048,576 EB, 1,073,741,824 PB, 1,099,511,627,776 TB, 1,125,899,906,842,624 GB, 1,152,921,504,606,846,976 MB, 1,180,591,620,717,411,303,424 KB 1,208,925,819,614,629,174,706,176 Bytes and 9,671,406,556,917,033,397,649,408 bits

some important details of programming language

Q.1 who invented C language?
ans: Dennis Ritchie .between 1969 and 1973 at AT&T Bell Labs
Q.2 who invented C++ language?
ans: C++ was developed by Bjarne Stroustrup at Bell Labs, starting in 1979
Q.3 who invented java?
ans:James Arthur Gosling.computer scientist, best known as the father of the Java programming language.
Q.4 who invented PHP?
ans: In 1994 by Rasmus Lerdorf php.
Q.5 who invented oracle?
ans: Larry Ellison and bob oats invented oracle in 1977.
Q.6 who invented FORTRAN?
ans : John Backus Invented FORTRAN the first practical high-level programming language, and he formulated the Backus–Naur form that described the formal language syntax.between 1954
1963.