Rio Sul Tower, where I've worked for months as an intern at the client Aracruz Celulose.
The project was a system for the financial department where they had a trading desk. The system recorded operations and the balances of each account and the investments.
Before internet was popular, companies such as that one were connected to the market via a Reuters subscription. They rented a terminal online 24 hours receiving news and quotes from markets of the entire world and it was very expensive.
There was a guy there who was incredibly good at trading and even tuned to what happened in Japan. He managed to multiply the employees' retirement fund with the transactions he had done.
