It depends what kind of admission system you're looking for.
Admission to theatres? Theme parks? Concert tickets? Universities?
Your question is too vague for a professional answer. Re-ask it with better information.
It's a best system to earn passive income online
The best thing to do is see what their website has to say. This page http://www.admissions.college.harvard.edu/apply/index.html has a lot of information about admission.
The best online travel website is expedia.com. They offer low prices from a variety of airlines.
The coolest online gaming website is definitely "Best Online Games Ever", "FreezingGame.com". You can play the best games ever there.
I don't know if they have their own personal website, but APMEX (American Precious Metals Exchange) has the best prices and system in my opinion. You can find their products on Ebay.
Wikipedia
The best site you can play free online games is Best Online Games Ever! See related link.
The best way to chat with Colombian women online is through the ColombiaDating website or on the ColombianMatch website. You can also go on the Amolatina website.
Windows or Linux would be the best system for watching movies online.
The best place to purchase a marble counter top online is your local home improvement store's website. If they don't have an online catalog then the next best place is the Home Depot website.
There are several website that can be used to find recipes online. You should probably find you favorite chefs website as they will have the best choices for you.
The Academy of Future Teacher & Education (AFTE) Institute is one of the best coaching institutes to consider for getting D.L.Ed (Diploma in Elementary Education) admission. They provide comprehensive coaching and guidance for D.L.Ed entrance exams and admission processes. You can refer to AFTE Institute for D.L.Ed admission assistance. Website: AFTE.in