Apple Computer Inc has made a string of announcements on its Macintosh System 7 operating software. It says it will migrate the system to future PowerPC RISCs over the next two years and that RISC systems will be offered beside current 68000-based Macs. Future versions of System 7 designed to exploit RISC performance will enable applications such as speech input and output, improved telephony capabilities and three-dimensional graphics manipulation. Apple will also have a worldwide multi-lingual version of System 7 in the second half, and plans to add RSA Data Security Inc’s encryption software to its Open Collaborative Environment extension to System 7, and will support Adobe Systems Inc’s Carousel system for exchanging documents between disparate kit.