In 2011, the average salary for all surgeons and physicians was $184,650 a year, reports the Bureau of Labor Statistics. But extremely high or low salaries can skew the average, and median wage is usually a better indication of earning potential. Half of all surgeons earn $187,000 or more a year.
a quantity or number coming at one time or taken together: a batch of prisoners. 2. the quantity of material prepared or required for one operation: mixing a batch of concrete. 3. the quantity of bread, cookies, dough, or the like, made at one baking.
Time-sharing systems are multi-user systems. Most batch processing systems for mainframe computers may also be considered multi-user, to avoid leaving the CPU idle while it waits for I/O operations to complete. However, the term  multitasking  is more common in this context.