If you only specify this keyword in the first job step, its value is inherited to the other job steps. For serial jobs If not specified, the job will be serial. Error mail is sent only if the job fails. Start mail is sent only when the job begins. Never mail is not sent.
Complete mail is sent when the job ends.
This is the default. The format is whatever is acceptable to the mailer. If you only specify this keyword in the first job step, its value is inherited to the other job steps. Tells the PVM process where to look for the executables when the parallel job spawns tasks. This is a list of characteristics desired but not necessary in a machine running this job.