Internships are a common way for junior/inexperienced people to gain work experience in an industry. Internships are commonly offered to students or those who have recently completed study.
In the Technology industry, internships are commonly (but not always) paid.
There are some specific internship programs aimed at women and other under-represented groups in technology or in specific subfields such as Open Source Software. These include:
Internships are also offered by some Code schools as part of their program.