Ken is starting his own accountant firm and wants to know what computer would be best for accounting. Leo says that the current trend is to use online bookkeeping, and what operating system he uses really doesn't matter. Having said that, he can save a lot of money with a Windows machine. Dell makes a great, professional platform. The Lenovo ThinkPad is also a good option. There is a ThinkPad with a number pad, too, which is ideal for data entry.