Opera mini is Internet browser used in mobiles. Its features, speed and security will give the best browser, More than 20 million people use Opera browser. Its free to download. It help to Stay in touch with your friends on Facebook, search with Google, get your e-mail on phone, do your online banking. To download opera go to www.opera.com and follow the instructions The shortcuts of opera mini 4.2 version. We can assign our favourite bookmarks in 1 to 9 keys. We can access it by Pressing the star(*) then the number pad keys . If you want a wide screen just press the *and hash(#) keys. By pressing 'star'key twice to get fullscreen mode. While browsing we can go straight to another site by using the # and number key 1, then enter the site name. To get your favourite bookmarks on browsing type # followed by number key 2. If you need the information on the bottom of large page use this # and 3. This is also used to get the top. To return to home page press # and 4. # and 5 give your browsing history. The page information given by the keys #and 6. To find some text press the keys # and * and type the keyword. To change settings of your opera by # and 8.

Nanotechnology refers broadly to a field of applied science and technology whose unifying theme is the control of matter on the molecular level in scales smaller than 1 micrometer, normally 1 to 100 nanometers,and the fabrication of device within that size range. It is highly multidisciplinary field, drawing from fields such as applied physics, material science, colloidal science, device physics, super molecular chemistry, and even mechanical and electrical engineering. Nanotechnology can be seen as an extension of existing sciences into the nanometer, or as a recasting of existing sciences using a newer, more modern term. Two main approaches are used in nanotechnology. The impetus for nanotechnology comes science, coupled with a new generation of analytical tools such as the atomic force microscope, and the scanning tunneling microscope. Combined with refined processes such as electron beam lithography and beam epitaxy,these instruments allow the deliberate manipulation of structures.

Now a days there are many people who use internet for many purposes. Some use for chatting, some use for business purposes, and many more are used. There are many people who use net for download. Many download file are being uploaded in RapidShare. Only limited are free users and thy can't download many files continously. After each file download we have to wait minimum of  15 mins. So this makes everyone to get a sad state and so many people takes many days time to download the full software or movie or what ever thy need.

So there is a trick to download rapidshare files continously one after the other. The trick is Dynamic IP address. many people uses dynamic ip address and it's available in broadband. So each time we switch off and switch on the modem, a new ip address is generated. So this is the thing we can use for downloading files from rapidshare.

1. After downloading file from rapidshare, switch off the modem and wait for few mins

2. Then again switch on the modem, a new ip address is generated.

3. So now u start to download a new file.

4. This makes u not to wait for more time after each time download.

 

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Mainframe computers can process several million-program instructions per second. Large organizations rely on this room-size system to handle large program with huge volume of data. Mainframes are mainly used by Banks, Insurance companies, Finance companies, Airline and Railways reservation system and so on.

 

Mainframes have even more access to storage space and to input/output device. To work with these extra device mainframes also have more powerful PROCESSORS. This power is useful and required by large corporations who have large amounts of data to process. For example, large international banks who have millions of customer accounts to update regular will need very powerful machine to process and maintain the data.

 

FEATURES OF MAINFRAME OPERATING SYATEM :

 

1. Virtual Storage :

Virtual storage is a technique that lets a processor an amount of main storage that is larger than the actual amount of real storage. Virtual storage operating system transfer data between real storage and disk storage as they are needed.

 

2. Multiprogramming

Multiprogramming means computer can execute more that one Job(program) at a same time. Multiprogramming simply reclaims the CPU during the idle periods and allow another job to execute.

 

3. Spooling

Spooling manages the output device for application by intercepting output device and directing it to a disk device instead. Then, when program complete executing, the operating system collects its spooled print output and direct it to output device like printer. And another advantage is the execution speed, it is faster.

 

4. Batch processing

Batch processing means work is processed in a unit of work called Job. Job may have one or more programs to execute in sequencially.

 

5. Time-sharing

Time sharing is also called as Interactive processing, because it allow user to interact directly to the computer.