Who needs numerical software?

• Kinds of users and their priorities:
  • Engineers and scientists generally, who make 12,000 requests/day to netlib and keep NAG and IMSL in business:
    1. Easy interface, hidden details
    2. Reliability
    3. Speed
  • HPCC community, solving biggest and hardest problems:
    1. Speed
    2. Access to details for tuning
    3. Reliable enough for their application
  • Teachers and Students
    1. Ease of understanding
    2. Access to some details for learning
  
  
• Can we please everyone with one ``medium''?