| A | B |
|---|
| Seniority | The amount of time an employee has worked for a company |
| Sit-down strike | A union pressure strategy in which employees stay on the job but refuse to work; also known as sit-in strike |
| Sick-out strike | A union pressure strategy in which all employees call in “sick” at the same time |
| Strike | A union pressure strategy in which employees stop working and leave their jobs |
| Union shop | A union security agreement in which employees are required to join the union after their probationary period |
| Union security | An agreement under which a union may or may not require company employees to join the union or pay dues |
| Trade union | A union made up of workers with a particular skill (e.g., plumbers, electricians); also known as a craft union |
| Wildcat strike | A union pressure strategy in which local union employees refuse to work but do not have the consent of the national union |
