The United States of Americas one of the largest countries in the world based on both population and land area. United States of America (USA), usually referred to as the United States (US), or America is a country in North America. It is made up of 50 states, a federal district, and five territories. The U.S. military has bases in many countries. The U.S. Naval base at Guantanamo Bay was rented from Cuba, even after that country had a Communist revolution.
The United States of America is the world's third largest country in size and nearly the third largest in terms of population. Located in North America, the country is bordered on the west by the Pacific Ocean and to the east by the Atlantic Ocean. Along the northern border is Canada and the southern border is Mexico.
The United States is the world's largest national economy in nominal terms and second largest according to purchasing power parity (PPP), representing 22% of nominal and 17% of gross world product (GWP). The U.S. dollar is the currency most used in international transactions and is the world's foremost reserve currency.[3 Its seven largest trading partners are Canada, China, Mexico, Japan, Germany, South Korea, and the United Kingdom. The U.S. is the world's largest producer of oil  and natural gas. It is one of the largest trading nations in the world Foreign investments made in the US total almost $2.4 trillion Labor mobility has also been important to the capacity of the American economy to adapt to changing conditions. Labor mobility has also been important to the capacity of the American economy to adapt to changing conditions. The invention of the transistor in the 1950s, a key active component in practically all modern electronics, led to many technological developments and a significant expansion of the country
U.S. technology industry Provides state-of-the-art technology and solutions to meet the needs of the operational components of the Department of Homeland Security and other first emergency agencies. Includes customer-focused and output-oriented RDT&E programs that balance risk, cost, impact, and time to delivery. The six areas within RD&I include: APEX Research and Development; Border Security; Chemical, Biological, and Explosive Defense; Counterterrorism; Cyber Security; and Disaster Resilience. This includes the Homeland Security Advanced Research Projects Agency. USA is one of the top most country which is having maximum Nobel laureates 0f 357. medical research. Both clinical and pre-clinical research phases exist in the pharmaceutical industry's drug pipelines, where the clinical phase is denoted by the term clinical trial
United states of America in Medical research may involve doing research into public health, biochemistry, clinical research, medical sciences. microbiology, physiology, oncology, surgery and research into many other non-communicable diseases such as diabetes and cardiovascular diseases. Stanford University, Harvard University, Yale University, Princeton University, University of Pennsylvania, Columbia University, University of Chicago, Brown University, Dartmouth College, Cornell University, Pomona College, Georgetown University USA has vast research background in the field of medical sciences many medical journals are published from USA with high impact factor a variety of medical journals exists for each respective medical specialty. The list of journals can also be organized by specialty. Journals may also be found in dedicated sections in the articles of the medical fields of interest