The NIST Chapter of Sigma Xi invites all NIST staff to join us for the Twenty-Third Annual NIST Sigma Xi Postdoctoral Poster Presentation (PPP). The PPP will take place on Friday, February 19th, 2016 in Lecture Rooms A and B and in the adjoining hallway in the Administration Building (Building 101). There will be two sessions: Session I (9:00 am to noon) featuring categories E (Engineering), M (Materials), and P (Physics); and Session II (1:00 pm to 4:00 pm) featuring categories B (Biology), C (Chemistry), T (Biotechnology), and Y (Polymers). Refreshments will be provided during both sessions. Abstracts for the presentations may be found at http://www.sigmaxiatnist.org/ppp. Please take this opportunity to meet NIST's newest researchers and to learn about the excellent work that they are doing.