Trade Union: A trade union is an organization formed by workers from related fields that work for the common interest of its members. They help negotiate wages, working conditions, rules, and other aspects with employers.
Collective Bargaining: This is a process where negotiations between employees (often represented by a trade union) and their employer(s) determine the terms and conditions of employment. It's like haggling at a market but on a much larger scale involving salaries and working conditions.
Socialism: Socialism is an economic system where society as a whole controls production with the aim to benefit everyone equally rather than allowing individual businesses to profit. Imagine if your entire class owned your school cafeteria together - that's socialism!