4.39.2 Greatest hits from previous weeks

4.39.2.1 What are the most common pitfalls awaiting new users?

https://mathematica.stackexchange.com/questions/18393/what-are-the-most-common-pitfalls-awaiting-new-users

 
As you may already know, Mathematica is a wonderful piece of software. 
However, it has a few characteristics that tend to confuse new (and sometimes not-so-new) users. That can be clearly seen from  ...
 

- asked by Dr. belisarius (405 votes), answered by Michael E2 (235 votes)

4.39.2.2 How do I clear all user defined symbols?

https://mathematica.stackexchange.com/questions/850/how-do-i-clear-all-user-defined-symbols

 
Is there some way to do this other than going to Evaluation -> Quit kernel and firing a new one up?
 

- asked by niklasfi (58 votes), answered by Artes (56 votes)