The necessary steps to correct the word "comupter" into "computer" automatically
(i) Goto Tools ⟶ Autocorrect option
(ii) Click the replace tab and type "computer" in Replace text box and "computer" in with textbox.
(iii) Then Click OK.
(iv) The word "Comupter" is replaced with "Computer" and displayed in the list.
(v) After entering this, when you type "comupter" in the document, it will be automatically changed to the correct spelling "computer".

Using The Insert Table Dialog Box:
(i) To insert a table with more control over the settings and properties, use the Insert Table dialog box. To open the dialog box, click Table ⟶ Insert ⟶ Table or Ctrl + F12. The Insert table dialog box appears.
(ii) In the Name text box give a suitable name to the table.
(iii) Specify the number of columns and rows either using spin arrows or enter the value directly.
(iv) Click the Heading check box to make the first row of the table as heading, automatically the Repeat heading check box will be enabled to repeat the heading row when the table spans more than one page.
(v) Select the Border check box to display table with grid.
(vi) Click OK button to create a table.

Different types of wireless technologies are:
1. Bluetooth:
(i) It is named after a Danish king named Harald Bluetooth.
(ii) Bluetooth is used to connect different electronic devices wirelessly to a system for transferring and sharing data.
(iii) Cell phones are connected to hands-free earpieces, wireless keyboard, mice and mike to laptops with the help of Bluetooth as it transmits information from one device to other device.
2. Infrared:
(i) Infrared technology is a type of wireless communication technology to transfer data between two infrared enabled devices through infrared radiation.
(ii) This technology plays a very important role in wireless data communication
(iii) Infrared is used in devices such as the mouse, wireless keyboard and printers.
3. Wi-Fi:
(i) Wi-Fi is a low-cost wireless communication technology.
(ii) A Wi-Fi setup consists of a wireless router which serves a communication hub, linking portable device with an internet connection.
(iii) This network facilitates connection of many devices depending on the router configuration.
4. Radio link:
(i) A radio link is a wireless connection(also called wireless Point-to-Point connection) between two nodes, or radio units, in a data network.
(ii) Each radio unit consists of a transceiver(a device that can both send and receive communication) and a highly directive antenna.
(iii) The antenna only emits or receives power in the direction it is pointing.
5. Microwave Link:
(i) Microwave is a line-of-sight wireless communication technology that uses high frequency beams of radio waves to provide high speed wireless connections that can send and receive voice, video and data information.
(ii) One of the reasons microwave links are so adaptable is that they are broadband.
(iii) They require no equipment or facilities between the two terminal points, so installing a microwave link is often faster and less costly than a cable connection.
5. Microwave Link:
(i) Microwave is a line-of-sight wireless communication technology that uses high frequency beams of radio waves to provide high speed wireless connections that can send and receive voice, video and data information.
(ii) One of the reasons microwave links are so adaptable is that they are broadband.
(iii) They require no equipment or facilities between the two terminal points, so installing a microwave link is often faster and less costly than a cable connection.
6. Satellite Link:
(i) Satellite communication is one of the wireless technologies, used to transfer the signals from the transmitter to a receiver with the help of satellites.
(ii) It is widely spread all over the world allowing users to stay connected virtually anywhere on the Earth.
(iii) The Satellites used in this mode of communication, communicate directly with the orbiting satellites via radio signals.

Advantages of using templates:
1. On using the standard templates, it is easy to create colour, attractive designs for slides.
2. Easily one can modify the templates, even we can download from Internet.
3. Attractive designs of templates are available; it will be the audience to look up of the presentation.
4. It creates attentive of audience.
5. Quick customization of templates, text, fonts, pictures were available. -
6. It have professional computer design.
7. A template is a design scheme and pre-defined layout for a specific purpose to be used for making presentations.

The most commonly used feature input method is built-in functions, the Function Wizard. To open the Function Wizard can be opened through. The menu choose Insert→ Function or using the shortcut key press Ctrl+F2.
(i) Once open, Select a category of functions to shorten the list, then scroll down through the named functions and select the required one.
(ii) When you select a function its description appears on the right-hand side of the dialog. Double-click on the required function.
(iii) The Wizard now displays a textbox where you can enter data manually in text boxes and the result will be displayed in the Result text box
ABS (Number/Cell Address): Number/ Cell Address is the value whose absolute value is to be calculated. The absolute value of a number is its value without +/- sign.
Example : =ABS (-76) returns 76, =ABS (74) returns 7, =ABS (0) returns 0.

(a) Bus: A bus is a collection of wires used for communication between the internal components of a computer.
(b) Data bus:
(i) Data busis a collection of wires to carry data in bits.
(ii) A data bus is used to transfer data between the memory and the CPU.
(iii) The data bus is bidirectional.
(c) Address bus:
(i) Address bus is a collection of wires to carry data in bits.
(ii) The address bus is used to point a memory location.
(iii) The address bus is unidirectional.
(d) Control bus:
(i) Control bus is a control line/collection of wires to control the operation/functions.
(ii) The control bus controls both read and write operations.

The method of repeated multiplication by 2 has to be used to convert such kind of decimal fractions.
The steps involved in the method of repeated multiplication by 2:
Step 1: Multiply the decimal fraction by 2 and note. the integer part. The integer part is either 0 or 1.
Step 2: Discard the integer part of the previous product. Multiply the fractional part of the previous product by 2. Repeat Step 1 until the same fraction repeats or terminates (0).
Step 3: The resulting integer part forms a sequence of 0s and 1s that become the binary equivalent of decimal fraction.
Step 4: The final answer is to be written from first. integer part obtained till the last integer part obtained.

Impact Printers:
(i) These printers print with striking of hammers or pins on ribbon. These printers can print on multi-part (using carbon papers) by using mechanical pressure.
(ii) For example, Dot Matrix printers and Line matrix printers are impact printers.
(iii) A Dot matrix printer that prints using a fixed number of pins or wires. Each dot is produced by a tiny metal rod, also called a "wire" or "pin", which works by the power of a tiny electromagnet or solenoid, either directly or through a set of small levers.
(iv) It generally prints one line of text at a time. The printing speed of these printers varies from 30 to 1550 CPS (Character Per Second).
(v) A Dot matrix printer that prints using a fixed number of pins or wires. Each dot is produced by a tiny metal rod, also called a "wire" or "pin", which works by the power of a tiny electromagnet or solenoid, either directly or through a set of small levers.

(vi) It generally prints one line of text at a time. The printing speed of these printers varies from 30 to 1550 CPS (Character Per Second).

Steps to find and replace a text
(i) Type the text you want to find in the Search for box.
For Example: To search for a word "Bombay" in a document and replace with "Mumbai", enter the word "Bombay" in the Search for box
(ii) To replace the word with different text, type the new text in the Replace with box
Click Find button, to start the search, the found word is highlighted
(iii) To replace text, click Replace button.
The highlighted word is replaced with the word given in the Replace with box.
(iv) Click Find All, Writer selects all instances of the search text in the document
(v) Click Replace All button, Writer replaces all matches.
(vi) Enable Match case to perform the search case sensitively so that uppercase and lower cases are distinguished separately.
(vii) Enable Whole Words only to make the search more specific to words used separately alone.

AutoText allows the user to assign text, tables, graphics and other items to a key or key combination. For example, rather than typing "TamilNadu" every time you use that phrase, you might just type "tn" and press F3.

1. Indirect access:
(i) This is most common method used in home and office networks.
(ii) The device e.g. computer connects to a network using Ethernet or Wi-Fi and the network connects to the Internet using Asymmetric digital subscriber line ADSL (cable or fibre).
2. Direct access:
(i) This is most common method used when travelling.
(ii) The device e.g. smart phone connects directly to the Internet using 3G/4G mobile networks or public Wi-Fi.
(iii) Internet access is sold by Internet Service Provider(ISPs) delivering connectivity at a wide range of data transfer rates via various networking technologies.

(i) The user needs page number at the bottom of all pages. It means footer will be required.
1. Footer will be used to add page number at the bottom of the page.
2. Double-click the footer area (near the bottom of the page).
3. Go to Header & Footer > Field.
4. In the Field names list, Select Page, and
5. then select OK.
6. To change the numbering format, go to Header & Footer > Page Number > Format Page Numbers.
(ii) To add page number at the bottom, we need to edit footer.

1. In Windows, the drive letter is assigned to the physical drive of the system.
2. It makes easy to remember the location of files. We can change or rename the drives.
3. Additional drives can be added as per the requirement.
4. In Linux, each drive and device have different designations. It is not represented by alphabet.
5. Yes, hard drives and floppy drives represented with drive letters.

The security modules of an Operating System protect the resources and information of a computer system against destruction and unauthorized user access. It is a process of ensuring OS integrity, confidentiality and availability.

Computer architecture deals with the engineering considerations involved in designing a computer. Computer Organization deals with the hardware components that are transparent to the programmer.

(a) -22₁₀ + 15₁₀

\((1111)_2 \Rightarrow(00001111)_2 \)
\((10110)_2 \Rightarrow(00010110)_2 \)
\(1 \text { 's complement } \quad \quad \quad =11101001 \)
\(2 \text {'s complement } \quad \quad \quad =11101010 \)
\((-22)_{10}+(15)_{10} \quad \quad \quad =11101001 \)
                                       \(= 00001111\)
                                      ______________
                                        1 1 1  0 1 0 1 0
                                      ______________
(b) 20₁₀ + 25₁₀

(10100)₂                       = (11001)₂
8 bit Format of 20₁₀  = 00010100
8 bit format of 25₁₀    = 00011001
20₁₀ + 25₁₀              =    _________
                                       00101101
                                     __________
20₁₀ + 25₁₀ = 00101101₂

(i) Spread sheet
(ii) Text tiles
(iii) Database
(iv) Microsoft outlook contact list
(v) Microsoft office address list
(vi) Word data file.

Letter, E-mail Message.

(i) Table ⟶ split cells
(ii) Using split cells icon
(iii) Right click ⟶ cell ⟶ split.

The contents of OpenOffice Writer window such as Title bar, Menu bar, Standard Toolbar, Formatting Tool bar, Ruler, Work space and Status bar.

1. Programming languages to develop software in computers and smart phones are available only in English.
2. Based on Python programming language, the first Tamil programming language "Ezhil" (எழில்) is designed.
3. Ezhil allows easy representation of computer program closer to the Tamil language Iogical constructs equivalent to the conditional, branch and loop statements in modern English based programming languages.
4. Ezhil converts the program code into Python AST objects and executes them as Python objects with full access to the Python programming language environment.
5. Ezhil is a promising candidate for a general purpose interpreted programming language in Tamil. Ezhil is currently a work in progress with several new and consistent features. We have reported the successful prototyping of Ezhil in Python

(i) Ecommerce or electronic commerce refers to transactions conducted via the internet. Ever time individual and companies are buying or selling products and services online they are engaging in ecommerce.
(ii) Ecommerce is a popular term for electronic commerce or even internet commerce.
(iii) Examples of ecommerce: Amazon, flipkart, eBay, Olx, Quikr,

(i) Slide Master is a slideshow slide template that determines the style, textures, theme, fonts, and background to be used on the slides. Slide Master can be used to adjust the presentation of all display slides at the same time.
(ii) A screen leader is the highest slide in a slider ladder that stores details about a presentation's theme and slide designs, including the setting, texture, fonts, effects, placeholder sizes, and placement. Find the master slide with a mouse, then select Master Layout from the Slide Master tab.

OpenOffice Calc allows three types of filters. They are:
1. AutoFilter
2. Standard Filter
3. Advanced Filter.
Filters are a feature for displaying and browsing a selected list or subset of data from a worksheet. The visible records satisfy the condition set by the user.

Chart is a powerful way to convey information to the reader through a pictorial representation. This facility enhances the presentation of data in an effective manner.