what is the

cost:
performance:
reliability:
size:
installed in numbers:
of super computers, main frame, personal computers and PDA'S ?

To find information about the cost, performance, reliability, and size of different types of computers such as super computers, mainframes, personal computers, and PDAs, you can use various sources of information. Here's how you can approach finding these details:

1. Cost: You can start by researching the current market prices and comparing them across different manufacturers, models, and specifications. Online retailers, manufacturers' websites, and technology review websites often provide information about the cost of various computer types.

2. Performance: To assess the performance of computers, you can look for benchmarks and performance reviews. Tech websites, blogs, and publications often conduct performance tests and provide rankings or comparisons between different types of computers. Pay attention to metrics like processing power, memory, graphics capabilities, storage, and overall system performance.

3. Reliability: Reliability is harder to gauge without specific data, as it can vary depending on the specific brand and model. You can check customer reviews and ratings for different computers to get an idea of their reliability. Look for reviews on reputable technology websites or online retailers, and consider feedback from users who have owned the computers for an extended period.

4. Size: Size can vary significantly across computer types. You can find information about the size of computers by referring to manufacturers' specifications on their websites. They usually provide dimensions or form factor details that can give you an understanding of the physical size.

5. Installed in numbers: The number of installations for different types of computers is a specific data point that may require more specific research. Market research reports, industry publications, and technology surveys may provide insights into the installed base of different computer types. These reports often analyze market share by type, which can give you an idea of comparative adoption rates.

Remember, technology is continuously evolving, and the specific details about cost, performance, reliability, size, and installed base can change over time. Consulting up-to-date sources and considering multiple perspectives will help you get the most accurate information.