What is the ruling on implementing electronic systems for the Central Bank to accelerate the collection of checks between it and other banks (which are mostly usurious), and what is the ruling on implementing general communication systems used by multiple entities such as companies and banks?

It is forbidden to prepare systems for the central bank if most of its transactions are usurious, because that involves aiding in sin. As for preparing multi-purpose communication systems, it is permissible, unless it is known with certainty or strong presumption that they will be used for something unlawful.