Hi
monishi15Codes are not necessary,
you will be provided with a search engine with which you can filter the degrees you wish to apply for by "country", "university", and "degree".
for example, if you choose only "USA", you will be given all the master and phd degrees provided by all universities in the US.
if you choose "Insead", you will be given all the degrees offered by Insead and the location of each degree if the university has more than one location.
if you have the code, it will save you effort.
there is no time limit within which you must choose your 5 universities,
so if you know the degree and the college but you don't know the code, you will face no problem in finding your desired degree and adding it to your list.
The interface of the search engine is so flexible and user-friendly