Simplify the following text for a Grade 8 native English-speaking person.
Original: NCQ and PATA TCQ have a maximum queue length of 32 in-flight commands ( 31 in practice ) , while SCSI TCQ has a maximum queue length of 264 in-flight commands .
Simplified: NCQ and PATA TCQ have a maximum queue length of 32 outstanding commands ( 31 in practice ) .