As per your requirement, your ad category should be Computers as its a Software related advert. In order to help you with selecting the most widely circulated newspaper across Kolkata, releaseMyAd provides with the Newspaper Decider.
Should you like to review the newspaper circulation details in Kolkata for various newspapers under the Computers section, please visit the following page: http://www.releasemyad.com/city/kolkata/computers. You can choose from the range of English dailies based on their circulation as well as choose from the combo packages available for the same as per your convenience.
Also please ensure that for a timely release of your Computer classified advert, you must complete the booking process as well as clear the payments for the same at least 2-3 days prior to the intended relase dates.