What is memory card???

 An electronic flash memory storage disk commonly used in consumer electronic devices such as digital cameras, MP3 players, mobile phones, and other small portable devices. Types of memory cards include PCMCIA, CompactFlash, SD Card, MiniSD, xD-Picture Card and others. Memory cards are usually read by connecting the device containing the card to your computer, or by using a USB card reader.

link

What is C ???

A high-level programming language developed by Dennis Ritchie at Bell Labs in the mid 1970s. Although originally designed as a systems programming language, C has proved to be a powerful and flexible language that can be used for a variety of applications, from business programs to engineering. C is a particularly popular language for personal computer programmers because it is relatively small -- it requires less memory than other languages.
The first major program written in C was the UNIX operating system, and for many years C was considered to be inextricably linked with UNIX. Now, however, C is an important language independent of UNIX.
Although it is a high-level language, C is much closer to assembly language than are most other high-level languages. This closeness to the underlying machine language allows C programmers to write very efficient code. The low-level nature of C, however, can make the language difficult to use for some types of applications.
link:https://www.facebook.com/shahriy.nub

programming language

A vocabulary and set of grammatical rules for instructing a computer to perform specific tasks. The term programming language usually refers to high-level languages, such as BASIC, C, C++, COBOL, FORTRAN, Ada, and Pascal. Each language has a unique set of keywords (words that it understands) and a special syntax for organizing program instructions.
High-level programming languages, while simple compared to human languages, are more complex than the languages the computer actually understands, called machine languages. Each different type of CPUhas its own unique machine language.

Lying between machine languages and high-level languages are languages called assembly languages. Assembly languages are similar to machine languages, but they are much easier to program in because they allow a programmer to substitute namesfor numbers. Machine languages consist of numbers only.
Lying above high-level languages are languages called fourth-generation languages (usually abbreviated 4GL). 4GLs are far removed from machine languages and represent the class of computer languages closest to human languages.
Regardless of what language you use, you eventually need to convertyour program into machine language so that the computer can understand it. There are two ways to do this:
1) compile the program
2) interpret the program
Recommended Reading: See compile and interpreter for more information about these two methods.
The question of which language is best is one that consumes a lot of time and energy among computer professionals. Every language has its strengths and weaknesses. For example, FORTRAN is a particularly good language for processing numerical data, but it does not lend itself very well to organizing large programs. Pascal is very good for writing well-structured and readable programs, but it is not as flexible as the C programming language. C++ embodies powerful object-oriented features, but it is complex and difficult to learn.
The choice of which language to use depends on the type of computer the program is to run on, what sort of program it is, and the expertise of the programmer.

link:

6x64 decoder can be formed with four 4x16 decoder and one 2x4 decoder

6x64 decoder can be formed with four 4x16 decoder and
one 2x4 decoder

link:

5x32 decoder can be formed with four 3x8 decoder and one 2x4 decode

5x32 decoder can be formed with four 3x8 decoder and
one 2x4 decode

link:

Decoder Expansion

5x32 decoder can be formed with four 3x8 decoder and
one 2x4 decode

linkhttps://www.facebook.com/shahriar.magh

Friendship Day

Friendship day was originally founded by Hallmark in 1919. It was intended to be a day for people to celebrate their friendship by sending eachother cards, but by 1940 the market had dried up, and eventually it died out completely. However, in 1998 Winnie the Pooh was named the world’s Ambassador of Friendship at the United Nations (believe it or not!), and in April 2011 the United Nations officially recognised 30th July as International Friendship Day; although most countries celebrate on the first Sunday of August!
According to the Friendship Day declaration, we are invited to “observe this day in an appropriate manner, in accordance with the culture and other appropriate circumstances or customs of their local, national and regional communities, including through education and public awareness-raising activities”.

click
link:daysoftheyear

The Importance Of Computers In Our Daily Lives

In the current world, it’s almost impossible to imagine that someone can live  without computers. Computers have become an electronic device of almost every day use for individuals of every age. They are essential in almost all the business dealings that are made nowadays. The most that any industry has gained from the discovery of the computers is the business industry because of its nature. Computers have gained significance as they have improved the efficiency and productivity of work done. Large amounts of information in industrial and business sectors as well as in the personal lives are stored on computers.
Computers can help businesses by making their staff efficient and productive and also save their valuable time in any business or office. Computers in schools will help the learners to comprehend the basic concepts better with the help of video or audio examples. Computers in higher learning institutions will help the professors and researchers to do their work very fast and in an efficient and better way and also help them to share the same knowledge with their other members of staff. Computers become a vital gadget in several sectors; railways, banking, electricity, telephone departments, shopping carts etc are just but a few of them. Computers are also used in the medical industry to help doctors in diagnosing the diseases quickly and efficiently. All the administrative systems, whether private or public are now using computers and this practice can be evident in every part of the world.
Computers have also helped the media and the entertainment industries. Be it a multi-million dollars movie or a two minutes commercial, computers have changed the usual concept of providing entertainment to the public. With the computer business growing so fast, the computer industry has also brought about an invention. Tablets, palmtops, and laptops have replaced the desktops. With the decrease in size, it has become very easy to carry the computer and use them anywhere you are to the fullest.
The importance of computers in our daily lives can be judged by the number of people using them each single day. Computer is not only used by professionals, but also by the little children and grownups at our homes.
Today, everything related to your everyday life can be done using computers. You can order your breakfast online using your computer, you can read newspaper online, you can work from the comfort of your home with the help of your computer, you can watch movies and videos through your computer, you can listen to music through your computer, you can read novels and books through e-books, you can play games, you can also contact people and talk to them through your computer etc. These are just but a few things that can be done with the help of your computer.

link: pixuffle.net

বিট ৬৪ অপারেটিং সিস্টেম ও তার উপকারীতা কি?

ইউন্ডোজ অপারেটিং সিস্টেম গুলোর মধ্যে বিট ৬৪ হলো বিট ৩২ এর তুলনায় অত্যধিকতর কার্যকরী অপারেটিং সিস্টেম। বিট ৩২ অপারেটিং সিস্টেম দিয়ে আপনি সর্বোচ্চ ৪ (চার) গিগাবাইট র‌্যাম হ্যান্ডেল করাতে পারবেন। তবে কোন কোন সময় তিন, সাড়ে তিন গিগার বেশি র‌্যাম হ্যান্ডেল করানো যায় না। আর বিট ৬৪ দিয়ে ১২৮ গিগাবাইট র‌্যাম হ্যান্ডেল করানো যাবে যা এখনো প্রায় কল্পনার বাহিরে। যেহেতু বিট ৩২ অপারেটিং সিস্টেমের ক্ষমতা ৪ (চার) গিগাবাইটের ভেতরে সীমাবদ্ধ তাই এর পরিচালন ক্ষমতা ও অনেক কম।

বিট ৬৪ অপারেটিং সিস্টেম বিট ৩২ এর চেয়ে অধিক সুরক্ষিত এবং এতে কোন ড্রাইভার ইন্সটল করতে হলে মাইক্রোসফট এর দেয়া ডিজিটাল সাইন ব্যবহার করতে হয়। যদি ঐ ড্রাইভারে ডিজিটাল সাইন না থাকে তাহলে ইন্সটল করার সময় ওয়ার্নিং দেখবে। বিট ৩২ এর চেয়ে ৬৪ বিটে উইন্ডোজের নিরাপত্তা ব্যবস্থা বেশি, বিশেষ করে Kernel Patch Protection অনেক বেশি শক্তিশালী হয়। 

সঠিকভাবে কাজ করার জন্য বিট ৬৪ এর জন্য ৬৪ বিটের সফটওয়ার আর ড্রাইভার যেমন দরকার তেমন বিট ৩২ এর জন্যও ৩২ বিটের সফটওয়ার আর ড্রাইভার দরকার। যে সব কাজের জন্য বেশি র‌্যাম প্রয়োজন তার জন্য ৬৪ বিটের বিকল্প নেই।

Collected by Shahriar

Link :  computers & technology