Here is better, more complete data about the Copyrights in NuttX. The apps/ directory does contain a considerable amount of ported 3rd party code which which throws thing off a bit. The core OS is exceptionally clean with mostly original code; the applications are a hodge-podge of original and ported code. Identification of Copyright notices was accomplished using 'grep'. It is prone to some errors in that it does not understand the context of the Copyright. Some of these may not be Copyrights on the file itself be some reference to other Copyrighted material. 'grep' isn't smart enough to know the difference.: This should be a complete accounting of all Copyrights other than any possible (probable) human errors. The executive summary is that I hold 88% of copyrights. 171 other people/organizations hold also have Copyrights. nuttx/ apps/ TOTAL Total Number of (regular) file: 13792 2961 16753 Total Number of files with Copyrights: 10918 1931 12849 [1] Total Number of Copyrights: 12107 2234 14341 [2] Copyright holders: Gregory Nutt (or Greg Nutt) 11314 [3,4,9] Sony 444 [5] Antony Dzeryn (Woopsi app) 119 Sebastien Lorquet 111 Haltian Ltd. 109 Ken Pettit 122 [8] Pinecone 105 [6] Omni Hoverboards Inc. 102 Alan Carvalho de Assis 100 [3] Pierre-Noel Bouteville 92 Nick Johnson (floating point library) 85 Atmel Corporation 79 Verge Inc. 77 [3,7] Uros Platise 75 Texas Instruments Incorporated 71 Adam Dunkels 65 Petro Karashchenko 51 Zilogic Systems 39 Masayuki Ishikawa 38 [3] STMicroelectronics 38 NXP Semiconductors, Inc. 35 Max Holtzberg 34 Silicon Laboratories, Inc. (Silicon Labs, Inc.) 31 Michael Haardt 30 Christian Walter (2006) 30 Intel Corporation 27 Future Technology Devices International 27 Freescale Semiconductor, Inc. 26 ARM Limited 26 Rommel Marcelo (2010) 25 Michał Łyszczek 25 Bill Gatliff 23 Abdelatif Guettouche 20 [3] Li Zhuoyi 20 Motorola Mobility, LLC 19 Citrus Project (1999) 19 NX Engineering, S.A. 18 [3,9] Vladimir Komendantskiy 17 DS-Automotion GmbH 16 Cadence Design Systems Inc. 15 B.ZaaR 15 Espressif Systems (Shanghai) PTE LTD 14 Brennan Ashton 14 [8] Swedish Institute of Computer Science 18 The Open Group 18 Gwenhael Goavec-Merou 13 Evans & Sutherland Computer Corporation 13 Marawan Ragab 13 Max Nekludov 13 Marco Krahl 12 (no name on copyright line) 12 CITEL Technologies Ltd. (2002) 11 RAF Research 11 Extent3D 10 Peter Andersson 10 Giorgio Groß 10 Xiaomi 9 [6] Infineon 9 Fundação CERTI 9 Augusto Fraga Giachero 9 TRD2 Inc 9 Jose Pablo Rojas Vargas (2012) 9 Tomasz Wozniak 8 China Beijing Armink 8 Volkan YAZICI 8 Itronix Inc. 8 Stavros Polymenis 8 Gábor Kiss-Vámosi 7 Offcode Ltd. 7 Neil Hancock 6 Filament 6 Young Mu 6 Ramtin Amin 5 Mycal Labs 5 Michael Smith 5 ON Semiconductor 5 Aleksandr Vyhovanec 5 PX4 Development Team 5 Doug Vetter 5 Laurent Latil 5 Uniquix Tecnologia / Uniquix Ltda 5 Marc Alexander Lehmann (2000) 5 Sun Microsystems, Inc. 5 Brian Webb 5 Cogito LLC 5 Tensilica Inc. 4 Make Schulte 4 Florian Olbrich 4 Oleksandr Tymoshenko 4 Google, Inc. 4 Acutronics Robotics 4 Broadcom Corporation 4 Anton D. Kachalov 4 UVC Ingenieure 4 Red Hat Incorporated. (2002) 4 Keith Packard 4 Jouni Malinen 4 Nordic Semiconductor ASA 3 Ivan Ucherdzhiev 3 Fabian Justi 3 Zglue Inc. 3 Studelec SA. 3 Wail Khemir 3 Pelle Windestam 3 Samuel Neves 3 Intuitive Aerial AB 3 Ales Verbic 3 Rich Felker 3 Michael Ringgaard 3 hwport.com 3 Dean Camera 3 H. Peter Anvin 3 Dave Gamble (2009) 3 FishSemi 2 [6] Matias Nitsche 2 The FreeBSD Foundation 2 Free Software Foundation, Inc. (2002) 2 Michael Jung 2 Ziggurat29 2 Wolpike LLC 2 Ansync Labs 2 Andrew Payne 2 Tormod Volden and Stefan Schmidt 2 DataVision s.r.o. 2 Matt Poppe 2 2018 Inc. 2 Geoff Norton 2 Dmitry Xmelkov 2 ChaN (2007) 2 Tim J. Robbins (2002-2004) 2 Pololu Corporation 2 Kosma Moczek 2 sysmocom - s.f.m.c. GmbH 2 David S. Alessio 2 [8] The NetBSD Foundation 1 The XFree86 Project, Inc. (1998) 1 The Regents of the University of Michigan (2004) 1 The Regents of the University of California (1989-1995)1 Stefan Richter 1 Patrizio Simona 1 Calvin Maguranis 1 ElFaro LAB S.L. 1 Erle Robotics (Juan Flores Muñoz) 1 Marcin Wyrwas 1 Marten Svanfeldt 1 Dean Camera 1 Weston Andros Adamson (2004) 1 Marius Aamodt Eriksen (2004) 1 Digital Equipment Corporation (1987) 1 Travis Geiselbrecht 1 Hexagon AB 1 Niels Provos (2002) 1 Sam Leffler, Errno Consulting 1 Damien Bergamini 1 Jussi Kivilinna 1 Stephen Satchell (1986) 1 Yu Qiang (2011) 1 Alexander Popov (2002) 1 Joerg Wunsch (2002-2005) 1 Helmut Wallner (2005) 1 Brooks Automation, Inc. (2013) 1 Daniel Vik (1999-2010) 1 Todd C. Miller (1998) 1 Kha Vo 1 Dave Marples 1 Wijnand Modderman 1 Chuck Forsberg 1 Andy Ritger (2001) 1 ETH Zuerich 1 Vytautas Lukenskas 1 Stefan Traby (2006) 1 Greg King (2005) 1 [1] Text, html files, image files have no copyright notices. Build-related files, scripts, and source files do. [2] Files may have multiple copyright on them for a variety of reasons. [3] ICLA filed [3] SGA filed [5] Major contributors from Sony have signed ICLAs (representing only themselves) [6] Pinecone and FishSemi are subsidiaries of Xiaomi, major contributors have signed ICLAs (representing only themselves) [7] Anthony Merlino has signed an ICLA and is the co-founder and CTO of, now, Verge Areo [8] I am not certain if Ken, David or Brennan have submitted ICLAs yet. They are expected. Ken has also verbally agreed to release his copyrights in the past if necessary. [9] NX Engineering, S.A, is a defunct business wholly owned by Gregory Nutt. I need to change the Copyright holder name to Gregory Nutt.