In the late 1980s and early 1990s, we see more advancements with computers becoming more useful for actual computational purposes. In 1989, Apple released the Macintosh Portable, it weighed and was extremely expensive, costing US$7,300. At launch it was one of the most powerful laptops available, but due to the price and weight, it was not met with great success, and was discontinued only two years later. That same year Intel introduced the Touchstone Delta supercomputer, which had 512 microprocessors. This technological advancement was very significant, as it was used as a model for some of the fastest multi-processor systems in the world. It was even used as a prototype for Caltech researchers, who used the model for projects like real time processing of satellite images and simulating molecular models for various fields of research.