and 2nd in the DARPA Grand Challenge and Carnegie Mellon's Boss won the DARPA Grand Challenge (2007). The university continues to be a leader in autonomous research and development. Dynamic random-access memory – In 1966, Robert H. Dennard invented the one-transistor memory cell consisting of a transistor and a capacitor for which a patent was issued in 1968. It became the basis for today's dynamic random-access memory (DRAM). MEMS – Harvey C. Nathanson invented the first MEMS (micro-electro-mechanical systems) device of the type now found in products ranging from iPhones to automobiles. Typical MEMS devices include the accelerometers found in smartphones and video game controllers, and the gyroscopes used in automobiles and wearables. Xerox PARC – Founded in 1969 by George Pake and Jack Goldman, Xerox PARC has been at the heart of numerous revolutionary computer developments as laser printing, Ethernet, the modern personal computer, graphical user interface (GUI) and desktop paradigm, object-oriented programming, ubiquitous computing, electronic paper, amorphous silicon (a-Si) applications, the computer mouse, and advancing very-large-scale integration (VLSI) for semiconductors. BLISS – system programming language developed at Carnegie Mellon by W. A. Wulf, D. B. Russell, and A. N. Habermann around 1970. It was perhaps the best known systems programming language until C made its debut in 1972. Emoticon – The first true emoticon was developed at Carnegie Mellon by Scott Fahlman in 1982. Hashtag – In a 2007 tweet, Chris Messina proposed vertical/associational grouping of messages, trends, and events on Twitter by the means of hashtags. Java – class-based object oriented programming language that was originally developed by James Gosling at Sun Microsystems (which has since been acquired by Oracle) and released in 1995 as a core component of Sun Microsystems' Java platform. Mach (kernel) – Richard Rashid and Avie Tevanian developed Mach at Carnegie Mellon from 1985 to 1994, ending with Mach 3.0, which is a true microkernel. Mach was developed as a replacement for the kernel in the BSD version of Unix, so no new operating system would have to be designed around it. Experimental research on Mach appears to have ended, although Mach and its derivatives exist within a number of commercial operating systems. These include NeXTSTEP and OPENSTEP, upon which macOS and iOS are based. Wi-Fi network – Alex Hills created the first wi-fi network using a local area network (LAN) on the Carnegie Mellon campus in 1993. Companies and entrepreneurship The Swartz