ISO 9000, what does it stand for mention only three objectives to meet in this standard and only three principals?

ISO9000 group of standards is about quality management systems and created to help organizations make sure that they meet the requirements of clients and other stakeholders.

From its objective, may be mentioned :

1. Gives businesses with useful, globally recognized models for operating a quality management system.
2. Achieve, maintain and aim to regularly enhance product quality (the standards define “product” as the output of any process. 
3. Primary objective of getting these standards is to boost the goodwill of organization. Customer can compare the quality of two companies , one is with ISO standard and other is without ISO standard .
4. To create a compliance standard which is followed24 hours-a-day,7 days-a week,52 weeks-a-year.
5. Offer confidence to internal management 

The ISO9000 family addresses various aspects of quality management and contains some of ISO’s best known standards. The standards provide guidance and tools for companies and organizations who want to ensure that their products and services consistently meet customer’s requirements, and that quality is consistently improved.

ISO which stands for International Organisation for Standardization which has different model as per the industry domain. Primary model is ISO9000

It is an voluntary organisation who have developed standards and terminology for electrical, electronic related technologies

It's base principal is on standard process and base on the guide points every organisation is required to create a basic standard operating procedures which shall improve the business process and work standard in the organisation to fulfill the customer requirement in best possible way.