1.Which of the following is most likely to have the highest threat of substitution?
A:Darunavir, an anti-HIV treatment
B:Dell's purchase of hard drives
C:gasoline purchases by individuals
D:choice of domestic airlines
2.Which of the following devices is used during the processing stage?
A:UPC reader
B:main memory
C:bar code scanner
D:printer
3.________ operating system supports almost all instruction sets
A:Windows
B:Mac OS
C:Linux
D:Unix