I need to enter the zip codes for all the participants.

The products in the store are labeled with bar codes.

The function codes are used to control the behavior of the program.

Geek codes are used to represent information about a person's interests and skills.

The handkerchief codes were used by the LGBTQ+ community to communicate their identities and preferences.

The codes of practice provide guidelines for professional conduct.

Fountain codes are used in wireless communication systems.

Erasure codes are used in data storage systems to provide fault tolerance and data recovery.

The developers are working on optimizing the native codes for better performance.

The building codes in this city are very strict.