I believe that finding the balance of drones would be putting a limit on how many drones a country can use at one time. I'm not sure on the other 2 questions.
Answer: Prohibition period from the early 1920s.
Explanation:
Many examples throughout history have had both positive and negative effects on society. Prohibition is one of the better examples. If alcohol were banned in the United States today, for example, there would be a "boom" of the country's black market. Alcohol would be made illegally and distributed on the black market. A positive response would be a reduction in the rate of violence and crime, given that a certain percentage of crime is linked to alcohol.
The Prohibition Period, however, proved to be a failed experiment in American history. The black market has risen sharply, and certain criminal groups have profited greatly. That profit is at the expense of the state since it is not legal. The ban creates a grey economy which badly affects the regular economy of the state.
An electronic calendar would be an example of software. The remaining things which you've mentioned in your questions would be examples of peripheral devices (so mouse, scanner, and monitor :)).
The terrorist´s main goal in committing the September 11, 2001 attacks was to cause terror within the frame of massive casualties in a scenario happenning inside the United States. Seen as a symbolic goal, it is rooted in many causes as stated by some of the terrorists´leaders, like the support of Israel by the United States; United States military presence in Saudi Arabia,etc.
sacred text - Buddha's teachings passed down.
Explanation: Tripitaka. ... They contain teachings of the Buddha on how to reach enlightenment as well as teachings to help guide Buddhists in their everyday life.