give med every 4 hours if needed
PRN means "as needed." For example, a provider may prescribe morphine 0.2 mg IV q4 hours PRN, so if the patient is not in pain, the nurse would not give it.
Every 4 hours while you are awake.
It simply means fourth quarter. As in September to December.
q4 in medical terms means every four, so q4h means every four hours and q4d means every four days.
The fourth quarter of the year, so October, November, December.
Q4 means "4th Quarter". A company has fiscal 4th quarter and annual 4th quarter. Fiscal (for financial) updates of the company and may start any month of the year. Annual 4th Quarter is the last 3 months of a year. (12 months/4 = 3 months per quarter)
It means to take two puffs every 4-6 hours.
In business, Q4 means the fourth quarter of the year. Typically that would be the months of October, November and December, unless the context is some company or organization's fiscal year, which may not correspond to the calendar year.
Later this year. Q3 2009. Depending on Samsung's fiscal year. It could mean July to August or October to December. Although many companies have Oct-Dec as Q4 some have it as Q3 and Q4 being Jan-Mar.
3+2i + 6-4i = 9-2i The real part of this number is positive, therefore it lies in Q1 or Q4. The imaginary part is negative, therefore it is in Q3 or Q4. Q4 is the common possibility, therefore 9-2i is in Q4.