In response to the internet revolution in electronic publishing and communication,
the CEIC was formed in 1998 to monitor such developments and advise the IMU and,
through it, the worldwide mathematics community.
Digital Mathematical Registries
This is a registry containing certain retrodigitized mathematical journals and monographs, maintained by Ulf Rehmann: Bielefeld DML: Digital Mathematics Library. It currently lists almost 300 journals and more than 4000 books.
Here is a registry of mathematical journals compiled and maintained by the American Mathematical Society: AMS Digital Mathematics Registry It currently lists over 1700 research journals.