Although IBM, ATT, and other giants have partly developed rather user-friendly experimental systems, because they need a huge computer capacity, not just any machine can handle them. So they cannot be immediately commercialized.
而像 IBM、AT&T 等大研究機構雖曾發展出部分還算好用的實驗系統，但由於需要很大的電腦計算能力，不是一般電腦可以做到的，因此也無法立即商業化。