Overall , the digital holdings for the Library consist of more than a petabyte of data as of 2015 .
Other databases available only from within the library include Nature , IEEE and Wiley science journals , Wall Street Journal archives , and Factiva .
The digital holdings for the Library consist of more than a petabyte of data as of 2015 .
Other databases available only from within the library include Nature , IEEE and Wiley science journals , Wall Street Journal archives , and Factiva .