 Engineering internships are typically pursued by undergraduate students during the summer recess between the Spring and Fall semesters of the standard semester-based academic cycle (although some US universities abide by a 'quarter' or 'trimester' cycle).These internships usually have a duration of 8–12 weeks and may be part-time or full-time as well as paid or unpaid depending on the company; sometimes students receive academic credit as an alternative or in addition to a wage.Shorter duration full-time internships over winter and other breaks are often available too, especially for those who have completed summer internships with the same firm.