There are many applications of internet such as:
1. Communication: Computer users around the world extensively use the email service on internet to communicate with each other. Pictures, documents and other files are sent as email attachments. VolP stands for Voice over Internet Protocol, referring to the protocol that underlies all internet communication.
2. Job search:
Nowadays many people search for their jobs online as it is quicker and there is a larger variety of jobs vacancies present. People can publish resume online for prospective job. Popular examples are Naukri.com, Linkedln, etc
3. Video conferencing: It enables direct face to face communication across networks via web cameras, microphones and other communication tools. Video conferencing can enable individuals in distant locations to participate in meetings on short notice, with time and money saving. Video conferencing is very interactive in education to communicate between teacher to teacher, teacher to classroom and classroom to classroom with students at different places.
4. E-commerce: E-commerce or electronic commerce is the buying and selling of goods and services, or transmitting of funds or data, over an electronic network. These transactions occur either business-to-business, business to consumer, consumer to consumer or consumer to business. Flipkart, Snapdeal, Paytm, etc are example of e-commerce.
5 Travel: One can use internet to gather information about various tourist place. It can be used for booking Holiday tours. Some of the websites providing this service are goibibo.com, makemytrip.com, olacabs.com.
6. Nowadays internet is almost use in every fields. Due to increase in technology, use of internet has benefitted the users in many ways. Internet enables millions of computers from different organization and people to communicate and share resource globally.

Different types of computer networks are:
1. LAN(Local Area Network):
(i) The local area network is a network which is designed to operate over a small physical area such as an office, factory or a group of buildings. LAN are widely used in variety of applications.
(ii) In LAN all the machines are connected to a single cable. Different topologies such as Bus, Ring, Star, Tree, etc. are used for LANs.
(iii) The size of LAN is usually small. The various devices in LAN are connected to central devices called Hub or Switch using a cable.
(iv) A LAN is usually a privately owned and links the devices in a single office, building or campus of up to few kilometres in size.
(v) The data rate for LAN can now range from 4 to 16 Mbps.
2. MAN(Metropolitan Area Network):
(i) A MAN is basically a bigger version of LAN. It is designed to extend over the entire city. MANs extend beyond 100 KM.
(ii) The MAN can be in the form of a single network such as a cable network or it can be a combination of multiple LANs.
(iii) A MAN may be wholly owned and operated by a private company or it may be a service provided by a public company, such as local telephone company(telco).
3. WAN(Wide area network):
(i) When a network spans a large distance or when the computers to be connected to each other are at wide separated locations a local area network cannot be used. For such situation, a Wide area Network(WAN) must be installed.
(ii) The communication between different users of WAN is established using leased telephone lines or satellite links and similar channels.
(iii) A WAN provides a long-distance transmission of data, voice image and video information over large geographical areas that may comprise a country, a continent or even the whole world.
(iv) WANs may use public, leased or private communication devices, and can spread over a wide geographical area. WAN that is wholly owned and used by a single company is often called as enterprise network.
(v) In most WANs the network contains a large number of cables or telephone lines each one connecting a pair of routers.
4. PAN (Personal area network):
(i) A personal area network, or PAN, is a computer network that enables communication between computer devices.
(ii) PANs can be wired, such as USB or FireWire, or they can be wireless, such as infrared, ZigBee, Bluetooth and ultra-wide band (UWB).
(iii) The range of a PAN typically is a few meters. Examples of wireless PAN (WPAN) are devices include cell phone, headsets, wireless keyboards, wireless mice, printers, bar code scanners and game consoles.
(iv) Hence computer network are classified into four types based on the size, distance and the structure namely: LAN (Local Area Network), MAN (Metropolitan Area Network), WAN (Wide Area Network) and PAN (Personal Area Network).

1. Plans objects go about as compartments for various articles or as depictions of data. Compartments - Figures show all plans objects.
2. Graphics routinely unite text, blueprint, and concealing. Visual computerization may include the intentional decision, creation, or course of action of typography alone, as in a handout, flyer, standard, site, or book with no other segment.
3. Clarity or reasonable correspondence may be the unprejudiced, relationship with other social segments may be searched for, or basically, the creation of an unquestionable style.
4. Outlines can be helpful or imaginative. The last can be a recorded variation, similar to a photograph, or comprehension by a specialist to include crucial features, or a skilled worker, where case the capability with whimsical delineations may get clouded.
5. It can similarly be used for designing.
6. At the point when an application makes a DC, the framework consequently stores a bunch of default objects in it (there is no default bitmap or way).
7. An application can analyze the characteristics of the default objects by calling the GetCurrentObject and GetObject capacities.
8. The application can change these defaults by making another item and choosing it into the DC.
9. An article is chosen into a DC by calling the SelectObject function.
10. An application can set the current brush tone to a predetermined shading esteem with SetDCBrushColor.
11. The GetDCBrushColor work returns the DC brush tone. The SetDCPenColor work sets the pen tone to a predefined shading esteem. The GetDCPenColor work returns the DC pen tone.

a. Select Format → Page from the Menu bar on the page setup, dialog box, choose background tab.
b. Select the type of fill you want for your background from the fine choices, None, color, gradient, hatching or bitmap. A list of choices for the selected fill type will appear → select it. Select one of the items on the list and click OK. The fill you have chosen is added to slide master then go normal view.
c. Select the first slide then right click → select slide design then select the design in slide master, then right click, a popup menu will appear, it displays 'back ground settings for all' you can choose 'No' option. The only first slide would not appear the background design.
Follow above steps to make first slide different from other slides.

Data base here will be a table with column name as register number, student name, Mark1, Mark2, and Mark3.
Below is the database as per the requirement given in the question:

For total, Formula used is =Sum (C2:E2) and then drag the cursor for below rows.
For average, Formula used is =F2/3 and then drag the cursor for below rows.

(i) Formatting Data in a cell gives additional effect to the text. Additional effect includes changing the font style, font size, automatic wrapping, bold, underline, italic etc. The data in Calc can be formatted in several ways. Using formatting icons can be used.
(ii) Text formatting : Making the cell contents as bold, italics, underlined, changing font style, size, colour etc., comes under text formatting.
(iii) Number formatting : Number formatting options are used to visually change the format of a numeric content. These formatting changes are appear for visual as, it does not change the original value. For example, To display a number as currency form use Number format: Currency.

Changing Column Width and Row Height :
(i) Often while entering data into a worksheet you will realize that the width of the column is not enough.
(ii) StarOffice Calc. allows you to change the width of a column and the height of a row. To change the column width, select the column whose width you want to change.
(iii) Click on Format → Column → Width and type the new column width in the dialog box, which appears as shown in figure Click on OK.

(iv) You can also change the column width in another way. Point to the line separating the column whose width you want to change from the next column.
(v) The mouse pointer becomes a double – headed arrow. Click and drag this pointer to the left to decrease the width and to the right to increase the width.

The Distributed Operating System is used to access shared data and files that reside in any machine around the world. The user can handle the data from different locations. The users can access as if it is available on their own computer.
The advantages of distributed Operating System are as follows:
(i) A user at one location can make use of all the resources available at another location over the network.
(ii) Many computer resources can be added easily in the network
(iii) Improves the interaction with the customers and clients.
(iv) Reduces the load on the host computer.

(i) The Central Processing Unit(CPU) has a Memory Data Register (MDR) and a Memory Address Register (MAR).
(ii) The Memory Data Register (MDR) keeps the data which is transferred between the Memory and the CPU. The Program Counter (PC) is a special register in the CPU which always keeps the address of the next instruction to be executed.
(iii) The Arithmetic and Logic unit of CPU places the address of the memory to be fetched, into the Memory Address Register.
(iv) A bus is a collection of wires used for communication between the internal components of a computer.
(v) The address bus is used to point a memory location. A decoder, a digital circuit is used to point to the specific memory location where the word can be located.
(VI) The address register is connected with the address bus, which provides the address of the instruction. A data bus is used to transfer data between the memory and the CPU.
(vii) The data bus is bidirectional and the address bus is unidirectional. The control bus controls the operations of both read or write operations.
(viii) The read operation fetches data from memory and transfers to MDR. control line performs two operations like read write using 1 or O.
(ix ) Also, the write operation transfers data from the MDR to memory. This organization is as shown in figure.

(i) The word in the RAM has the same size (no.of bits) as the Memory Data Register (MDR). If the processor is an 8-bit RAM processor like Intel 8085, its MDR and the word in the both have 8 bits.
(ii) If the size of the MDR is eight bits, which can be connected with a word in the memory which is also eight bits size. The data bus has eight parallel wires to transfer data either from MDR to word or word to MDR based on the control(Read or write).

(iii) This control line is labeled as which becomes 1 means READ operation and 0 means WRITE operation. shows content of M'DR and the Word before the READ operation. Also shows the content of MDR and the Word after the READ operation.

(iv) The read operation transfers the data (bits) from memory word to data register. The write operation transfers the data (bits) from memory data register to word.

98.46₁₀
1. Integer part

2. Fractional part
0.46 x 2 = 0.92 = 0
0.92 x 2 = 1.84 = 1
0.84 x 2 = 1.68 = 1
0.68 x 2 = 1.36 = 1
0.36 x 2 = 0.72 = 0
0.72 x 2 = 1.44 = 1
98.46₁₀ = (1100010.011101...)₂

(i) Mail merge is a process to create personalized letters and pre-addressed enveloped or mailing labels forms mailings form a form letter
(ii) The feature is usually employed in a word processing document which contains fixed text and variables (which act as place holders that are replaced by text from the data source.)
(iii) It is used to create multiple documents at once. These documents have identical layout, formatting, text and graphics.
(iv) The documents can create will mail merge include bulk labels, letters, envelops and emails and more using information stored in a list, database or spreadsheet

Resize the position of Table:
A newly created table will occupy the entire width of the page area by default. The table can be resized as per our requirement:
(i) To resize a table quickly, move the mouse over the table edge until the cursor becomes a double headed arrow, and drag the border to its new desired position.
(ii) To resize a row height/column width using Mouse:
(iii) To resize row height
(iv) Move the insertion point over the horizontal border for the row height now the insertion point will change into double headed arrow, click and drag to resize the row height.

The header is a section of the document that appears in the top margin, while the footer is a section of the document that appears in the bottom margin of the page. Typically, headers display the title or chapter name, author name of a document while the footer displays the page number, date, time etc which gets displayed on all the pages automatically.
To Insert Headers and Footers:
(i) Select from the main menu Insert -> Header -> Default
(ii) The header text area is separated from the normal text are (a)
(iii) Enter the text that is to be repeated in all pages or Select Insert -> Fields -> Title.
(iv) The Header dialog box is displayed
To insert a Footer, the steps are as given below:
(i) Select from the main menu Insert -> Footer -> Default
(ii) Piace the cursor in the Footer part of the page.
(iii) Select Insert -> Fields -> Page Number.
Once the headers and footers are given in the first page, the same text appears in all the pages.
Inserting and Formatting Page Numbers:
Once the Header/footer area is enabled, the page numbers can be inserted by performing the following steps:
(i) position the cursor where you want to insert the number
(ii) choose Insert -> Fields -> Page Number
(iii) The page number appears with a gray background
Normally, the page numbers appear as 1,2,3 ..... , To change the numbering style, the following sequence of steps can be performed:
(i) Position the cursor where the page number has to appear
(ii) Select Format -> page, which will bring the page style dialog box
(iii) Select page Tab
(iv) In the Layout settings, select the format drop down combo box
(v) Select the desired style and click OK button