computer programs and related manuals all sold as a unit for installing operating system programs

'comput':1 'instal':12 'manual':5 'oper':13 'program':2,15 'relat':4 'sold':7 'system':14 'unit':10

computer programming services pertaining to installing operating system programs

'comput':1 'instal':6 'oper':7 'pertain':4 'program':2,9 'servic':3 'system':8

[ computer instruction manuals pertaining to installing operating systems programs ]

'comput':1 'instal':6 'instruct':2 'manual':3 'oper':7 'pertain':4 'program':9 'system':8

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