Which type of software license allows you to make changes to the software code?

Whats are the different parts of no verbal comunication, especially body language?

Assume that there is a 4% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on three independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

Which of the following is not a symptom of chronic fatigue syndrome