Contacts saved in the common CSV format (comma separated value) can be usually converted to some other contacts containing format, such as ICS format, with email and other personal information managers simply with the use of import/export functions. Programs like Outlook are the best choice for csv to ics conversion.
Convert Comma Separated Value to iCalendar calendar file format (Microsoft Outlook, Apple iCal).
We have found 2 software records in our database eligible for .csv to .ics file format conversion.
Microsoft Windows software - convert csv to ics on Windows
An e-mail management tool distributed with Microsoft Office suite
Convert from csv file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned csv to ics. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
An older office and productivity suite for Windows