thodg/slides

diff --git a/Makefile b/Makefile
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--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,10 @@
 THEME = Warsaw
 
 MD = \
+	bsd.md \
 	test.md
 
 TEX = \
-	bsd.tex \
 	railsonlisp.tex
 
 all: pdf
diff --git a/bsd.md b/bsd.md
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+UNIX
+
+Thomas de Grivel <thoxdg@gmail.com>
+
+https://kmx.io/
+
+2020-03-11
+
+# UNIX
+
+## History
+
+### Diagram
+
+![UNIX](unix-history.png)
+
+### Multics
+
+1960  
+
+Companies
+
+  - MIT
+  
+  - AT\&T Bell labs
+  
+  - General Electric
+
+### UNIX
+
+AT\&T Bell Labs 1970  
+
+Developers
+
+  - Ken Thompson
+  
+  - Dennis Ritchie
+
+### Berkeley Unix
+
+1974  
+
+Licensed by AT\&T
+
+### Berkeley Software Distribution
+
+1979  
+
+  - `vi`
+  
+  - `csh`
+
+Licensed by AT\&T
+
+### BSD License (1/2)
+
+    Copyright (c) <year> <copyright holder>.
+    All rights reserved.
+    
+    Redistribution and use in source and binary forms are
+    permitted provided that the above copyright notice and
+    this paragraph are duplicated in all such forms and
+    that any documentation, advertising materials, and
+    other materials related to such distribution and use
+    acknowledge that the software was developed by the
+    <organization>. The name of the <organization> may
+    not be used to endorse or promote products derived
+    from this software without specific prior written
+    permission.
+
+### BSD License (2/2)
+
+    THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
+    LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+    AND FITNESS FOR A PARTICULAR PURPOSE.
+
+### Net/1
+
+June 1989  
+
+Basis for
+
+  - NetBSD
+  
+  - FreeBSD
+
+Under BSD License
+
+### Minix
+
+Andrew S. Tannenbaum
+
+  - For teaching
+
+  - Not BSD
+
+  - GPL
+
+### Linux
+
+Linus Torvalds
+
+  - Inspired by Minix
+
+  - Not BSD
+
+  - GPL
+
+### NetBSD
+
+Computer Systems Research Group of the University of California,
+Berkeley
+
+  - Started in 1993 from Net/2 and 386BSD
+
+  - BSD License (two, three, and four-clause variants)
+
+  - **Portable**
+
+Founders :
+
+  - Chris Demetriou
+
+  - Theo de Raadt
+
+  - Adam Glass
+
+  - Charles Hannum
+
+### FreeBSD
+
+  - Started in 1993 also from 386BSD
+
+  - FreeBSD 2.0 in 1994, without code from AT\&T
+
+  - **Fast** `jemalloc` in base
+
+### OpenBSD
+
+Theo de Raadt
+
+  - forked from NetBSD in 1995
+
+  - **Secure by default**</span>
+
+  - Home of CARP, cwm, httpd, LibreSSL, OpenBGPD, OpenIKED,
+    **OpenNTPD**, OpenOSPFD, OpenRsync, OpenSMTPD,
+    **OpenSSH**, PF, pfsync, sndio, spamd, Xenocara
+
+### Darwin
+
+  - Forked from FreeBSD by Apple Inc. in 2000
+
+  - Includes code from NeXTSTEP and Mach
+
+  - Basis for MacOS X, iOS, iPadOS
+
+  - Apple Public Source License (APSL), with closed-source drivers
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