What are 3 benefits for the guest workers of being guest workers

The H-2A program brings in an unlimited number of agricultural guest workers.

The H-2B program brings in unskilled workers.

The H-1C program brings in foreign nurses.

The H-1B program brings in foreign workers in "specialty occupations," including computer programmers, engineers, accountants, doctors, and K-12 teachers.

The J-1 program, a work-study program, brings in workers to fill many jobs traditionally filled by American high school and college students.  

The L-1 "Intracompany Transferee" visa allows a company to bring an employee who has worked for that company abroad for one year to the United States.

Explanation:

a.impressment of us soldiers

the steam engine.

the locomotive.

the telephone.

the telegraph.

the internal combustion engine.

the rifle.

ironclad ships.

electricity/light bulb.