Thanks to all who checked the list! I've found 3 duplicates: Scott Mansfield, Paul Wouters and Charles Perkins. All of them would have been detected if I'd thought to run the check mechanically instead of relying on my eyesight - sorry! A new list is attached below. I'll send out the final list after the challenge period has passed. Harald 1 Adam Montville 2 Adrian Farrel 3 Alan Johnston 4 Allison Mankin 5 ANDREW Dolganow 6 Andrew Newton 7 Andrew Yourtchenko 8 Andy Bierman 9 ANM Zaheduzzaman Sarker 10 Anoop Ghanwani 11 Anthony Nadalin 12 Ari Keranen 13 Benno Overeinder 14 Bernard Aboba 15 Bhumip KHASNABISH 16 Bill Fenner 17 Bing Liu 18 Borje Ohlman 19 Carl Moberg 20 Carlos Martinez 21 Cengiz Alaettinoglu 22 Charles Eckel 23 Charles Perkins 24 Chris Bowers 25 Chris Inacio 26 Christer Holmberg 27 Christian Hopps 28 Christian Huitema 29 Christian O'Flaherty 30 Cong Liu 31 Corinna Schmitt 32 Cullen Jennings 33 Damien Saucez 34 Daniele Ceccarelli 35 Dapeng Liu 36 David Conrad 37 David Lamparter 38 David Mandelberg 39 David Sinicrope 40 Dean Bogdanovic 41 Derek Atkins 42 Dhruv Dhody 43 Dimitri Papadimitriou 44 Donald Eastlake 3rd 45 Dorothy Gellert 46 Edward Lemon 47 Eliot Lear 48 Emil Ivov 49 Eric Gray 50 Eric Vyncke 51 Fabio Chiussi 52 Fangwei Hu 53 Fernando Gont 54 Fred Baker 55 George Michaelson 56 George Swallow 57 Georgios Karagiannis 58 Gonzalo Salgueiro 59 Gregory Mirsky 60 Hannes Gredler 61 Hongyu Li 62 Huaimo Chen 63 Huaru Yang 64 Ignas Bagdonas 65 iuniana oprescu 66 Jason Weil 67 Jean-Marc Valin 68 Jean-Michel Combes 69 Jeff Tantsura 70 Jeffrey Haas 71 Jesus Maria Martin Garcia 72 Joel Halpern 73 John Bradley 74 John Brzozowski 75 John Drake 76 John Mattsson 77 John Scudder 78 Jon Hudson 79 Jon Mitchell 80 jouni korhonen 81 Karen O'Donoghue 82 Keith Drage 83 Keith Moore 84 Kenneth Gray 85 Kent Watsen 86 Kepeng Li 87 Keyur Patel 88 Laurent Ciavaglia 89 Lee Howard 90 Liang Xia 91 Linda Dunbar 92 Lingli Deng 93 Lixia Zhang 94 Louis Berger 95 Lucy Lynch 96 Lucy Yong 97 Luigi Iannone 98 Mach CHEN 99 Magnus Westerlund 100 Mahalingam Mani 101 Mark Townsley 102 Matthew Bocci 103 Matthew Lepinski 104 Mehmet Ersue 105 Michael Jones 106 Michael StJohns 107 Michal Krsek 108 Min Ye 109 MONIQUE MORROW 110 nalini elkins 111 Nancy Cam-Winget 112 Nathan Egge 113 Niel Harper 114 Ning Kong 115 Ning Zong 116 Ole Jacobsen 117 Ole Trøan 118 Orit Levin 119 Pascal Thubert 120 Patrick McManus 121 Paul Ebersman 122 Paul Wouters 123 Peng Fan 124 Peter Koch 125 Peter Lothberg 126 Peter Resnick 127 Peter Yee 128 Pål-Erik Martinsen 129 QIN WU 130 ram krishnan 131 Rich Salz 132 Richard Barnes 133 Richard Li 134 Robby Simpson 135 Ron Bonica 136 Ross Callon 137 Ross Finlayson 138 Salvatore Loreto 139 Sam K. Aldrin 140 Samuel Weiler 141 Sanjay Mishra 142 Scott Mansfield 143 Sheng Jiang 144 SHUCHENG LIU 145 Simon Perreault 146 Simon Pietro Romano 147 Sri Gundavelli 148 Stephan Friedl 149 Stephan Wenger 150 Stephen Kent 151 Steve Donovan 152 Steve Olshansky 153 Steven White 154 Steven Wright 155 Stig Venaas 156 Suhas Nandakumar 157 Suresh Krishnan 158 Susan Hares 159 Taiji Kimura 160 Thomas Nadeau 161 Thomas Walsh 162 Tim Wicinski 163 Timothy Terriberry 164 Timothy Winters 165 Tina (Ting) Tsou (Zou) 166 TIRUMALESWAR REDDY KONDA 167 Tobias Gondrom 168 Toerless Eckert 169 Tomohiro Fujisaki 170 Tony Hansen 171 Uma Chunduri 172 Varun Singh 173 Vic Liu 174 Vijay Gurbani 175 Warren Kumari 176 Wassim Haddad 177 Wijnands IJsbrand 178 Xufeng Liu 179 Yi Zhao 180 Yihong Huang 181 Yizhou Li 182 Yuanlong Jiang 183 Zhaohui Zhang