It's a substandard indication for your tab, if you can't afford to reimburse it.
Answer:
Speciality is a pursuit, area of study, or skill to which someone has devoted much time and effort and in which they are expert
World War I took the United States out of a recession into a 44-month economic boom. 30 Before the war, America had been a debtor nation. After the war, it became a lender, especially to Latin America. U.S. exports to Europe increased as those countries geared up for war.
-google
More technology and innovation lead to faster and more efficient production, leading to more profits for companies and more money for the growing economy.