A
Foreclosures and bankruptcies
Unemployment soared
It made transportation and trade easier.
Answer:
They made operations more technical because users had to program their own computers.
The first main reason was most of the market was based solely on credit, which was stock that was purchased without actual cash, but purchased on credit.
The second factor was the massive pull out by many investors due to a panic that caused the Banks to attempt to purchase these stocks leading to a complete collapse in the market.