Greetings of the day from Siddhivinayak Solutionss!!
As the computer is man made machine and man had feeded data in it
Computer can only store the data and it can give the out put wherein a man can judge the period, time, identification.
Whereas computer gives a proper calculations if it is feed properly and there are chances of calculation errors in man made horoscope.
As the knowledge differs from person to person wherein the software gives you the feeded details as output.
The most accurate for prediction is a good astrologer (Man on earth)