• GPS, Assisted GPS (A-GPS), cellular network positioning (AFLT/OTDOA/Cell ID), WiFi positioning (RSSI, RTT, fingerprinting, trilateration), hybrid positioning, indoor positioning, crowdsourced database, position location protocols in 3GPP/3GPP2 (IS-801/RRLP/RRC/LLP/SUPL), location-aware apps, location-based services (LBS), navigation, wide area and global GPS reference networks, extended ephemeris, • Object-oriented software design, software development, mathematical algorithms, modeling, statistics, numerical analysis, probability theory, data analysis • Languages/OS: C, C++, Matlab, Unix shell, Windows, Linux, Solaris, Mac OS X