Hi, I am a civil engineer in our country working in the field of engineering education. My purpose in joining this site is for me to learn the features and functionality of CR4. I am planning to build a site that accepts registration and hoping to build a community of engineering students from inside and outside my country. Here are my questions:
1. Is this site uses an open-source CMS, if so, what is it?
2. How many people are involved in building this site?
3. How long was the development time?
Thanks in advance. BTW, what is the meaning of CR4?