- Call centers
- Help desks
- Stock trading
- Medical devices
- Multi-lingual areas
- Security areas
- Studio equipment
- Emergency equipment
- Banking services 
- Intelligent houses
- Telephones
- Vehicle instrumentation
- Air traffic controls
- Remote controls

During year 2000 there were over 200 million keyboards sold in one year. 

The total number of computers in the world is growing exponentially and now approaching a billion computers [1]. There are at least 750 million keyboards on the market today (31/12/2000). 

[1] Ask Dr Internet # 17
http://promo.net/drnet/drnet17.htm#0