science and technology have a vital role in the success and prosperity of human beings and is also called the most important instrument in the economical development. nowadays, no powerful country can get power without science and technology, in other words, no social and economical promotion will be attainable without these two keys. here in this research, in addition to analysis and the intro...

today, every enterprise needs to have its own business model. a business model explains what exactly the costumers want, how they want it and how the company can satisfy them. this can actually leads to the industry's competitive advantages and help the enterprises to revive them. in the late decades the prevalence of e-commerce leads it to be known as a tool to organize the business and s...