Types of slavery

 In order to recognize if you are being exploited in ways that can be close to enslavement, here is list of types of slavery that were identified in past:

Chattel slavery

As a social institution, chattel slavery classes slaves as chattels (personal property) owned by the enslaver; like livestock, they can be bought and sold at will.

Chattel slavery was practiced in places such as the Roman Empire and classical Greece, where it was considered a keystone of society. Other places where it was extensively practiced include Medieval Egypt, Subsaharan Africa, Brazil, the United States and parts of the Caribbean such as Cuba and Haiti.

Beginning in the 18th century, a series of abolitionist movements saw slavery as a violation of the slaves' rights as people ("all men are created equal"), and sought to abolish it.

Indentured servitude 

A form of labor in which a person is contracted to work without salary for a specific number of years. The contract, called an "indenture", may be entered voluntarily for purported eventual compensation or debt repayment, or imposed involuntarily as a judicial punishment. Many came with forged or no contract they ever saw.

Historically, for an apprenticeship, when an apprentice worked with no pay for a master tradesman to learn a trade (similar to a modern internship. This was often for a fixed length of time, usually seven years or less). Apprenticeship was not the same as indentureship, although many apprentices were tricked into falling into debt and thus having to indenture themselves for years more to pay off such sums.