diff --git a/API.md b/API.md
new file mode 100644
index 0000000..5a5bbf9
--- /dev/null
+++ b/API.md
@@ -0,0 +1,15 @@
+## Liste des API 
+
+Bibliothèques disponibles dans COS2000
+
+###  libc 
+
+Fonctions disponibles dans la librairie "libc"
+
+#### test_api
+
+u32 test_api(void);
+
+syscall id : 0
+arguments : 0
+résultat : oui (0x66666666)
diff --git a/include/process.h b/include/process.h
index 3bc13a0..ee1573d 100755
--- a/include/process.h
+++ b/include/process.h
@@ -85,7 +85,7 @@
 /* OS identification */
 #define ELFOSABI_NONE 	0 	//No extensions or unspecified
 #define ELFOSABI_LINUX 	3 	//Linux
-#define ELFOSABI_COS2000 15 //COS2000
+#define ELFOSABI_COS2000 16 //COS2000
 
 /* ELF header */
 typedef struct elf32 {
diff --git a/include/syscall.h b/include/syscall.h
index 300949c..94b7f58 100644
--- a/include/syscall.h
+++ b/include/syscall.h
@@ -5,13 +5,6 @@
 #define sysexit() asm volatile ("sysexit"::);
 
 
-#define inb(port) ({	\
-	u8 _v;	\
-	asm volatile ("inb %%dx,%%al" : "=a" (_v) : "d" (port)); \
-	_v;	\
-})
-
-
 #define syscall0(syscall) ({ \
 	u32 _v; \
 	asm volatile (\
diff --git a/lib/makefile b/lib/makefile
index 815b6a1..1099343 100755
--- a/lib/makefile
+++ b/lib/makefile
@@ -1,4 +1,4 @@
-CC=gcc -O0 -g -nostdinc -ffreestanding -fno-builtin -Wall -w -m32 -F pe-i386 -I ../include
+CC=gcc -O0 -g -nostdinc -ffreestanding -fno-builtin -Wall -w -m32 -F elf_i386 -I ../include
 LINK=ld -m elf_i386 -r -o
 SRCS= $(wildcard *.c)
 OBJS= $(SRCS:.c=.o)
diff --git a/lib/process.c b/lib/process.c
index 1b3b3c4..89f2fb4 100644
--- a/lib/process.c
+++ b/lib/process.c
@@ -14,7 +14,7 @@ u32 lastpid;
 
 u8 elf_errors1[]="Aucune signature ELF";
 u8 elf_errors2[]="Fichier au format ELF mais non 32 bits";
-u8 elf_errors3[]="ELF non MSB";
+u8 elf_errors3[]="ELF non LSB";
 u8 elf_errors4[]="ELF mauvaise version";
 u8 elf_errors5[]="ELF pour OS ne correspondant pas";
 u8 elf_errors6[]="Mauvais type de machine";
@@ -37,8 +37,6 @@ u32 elf_test(u8 *src)
 	    && header->e_ident[EI_MAG2] == ELFMAG2 && header->e_ident[EI_MAG3] == ELFMAG3)
         {
         if (header->e_ident[EI_CLASS]!=ELFCLASS32)
-            return 1;
-        if (header->e_ident[EI_DATA]!=ELFDATA2LSB)
             return 2;
         if (header->e_ident[EI_DATA]!=ELFDATA2LSB)
             return 3;
diff --git a/makefile b/makefile
index bafca3d..1d7a8be 100755
--- a/makefile
+++ b/makefile
@@ -1,4 +1,4 @@
-all: bits32 bits64 harddisk uefi
+all: programs bits32 bits64 harddisk uefi
 	sync
 
 bits32: ARCH=bits32 
@@ -9,6 +9,11 @@ bits64: ARCH=bits64
 bits64: lib/libs.o system/system.sys
 	sync
 
+programs: programs/test
+
+programs/test:
+	make -C programs
+
 harddisk: final/harddisk.img.final
 
 uefi: final/harddiskuefi.img.final
@@ -17,20 +22,22 @@ install:
 	(sudo apt-get install nasm gcc qemu fusefat fuseext2 cgdb ovmf bsdmainutils tar bsdmainutils indent binutils bochs bochs-x bochsbios)
 
 clean:	
-	(cd system; make clean)
-	(cd lib;make clean)
-	(cd final;make clean)
+	make -C system clean
+	make -C lib clean
+	make -C final clean
+	make -C programs clean
 	sync
 
 littleclean:	
-	(cd system; make clean)
-	(cd lib;make clean)
-	(cd final;make littleclean)
+	make -C system clean
+	make -C lib clean
+	make -C final littleclean)
+	make -C programs clean
 	sync
 
 indent:
-	(cd system; make indent)
-	(cd lib;make indent)
+	make -C system indent
+	make -C lib indent
 	sync
 
 backup: clean
@@ -85,13 +92,13 @@ qemu64:
 	(killall qemu-system-x86_64;qemu-system-x86_64 -m 5G -drive format=raw,file=./final/harddiskuefi.img.final --bios /usr/share/qemu/OVMF.fd --enable-kvm -cpu host -s &)  
 	
 system/system.sys:
-	(cd system; VESA=$(VESA) make)
+	make -C system VESA=$(VESA)
 
 final/harddisk.img.final:
-	(cd final; make harddisk.img.final)
+	make -C final harddisk.img.final
 
 final/harddiskuefi.img.final:
-	(cd final; make harddiskuefi.img.final)	
+	make -C final harddiskuefi.img.final	
 
 lib/libs.o:
-	(cd lib; make)	
+	make -C lib	
diff --git a/programs/Programmes utilisateurs à venir b/programs/Programmes utilisateurs à venir
deleted file mode 100644
index e69de29..0000000
diff --git a/programs/include/libc.h b/programs/include/libc.h
new file mode 100644
index 0000000..24971bc
--- /dev/null
+++ b/programs/include/libc.h
@@ -0,0 +1,7 @@
+/*******************************************************************************/
+/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas             */
+/*                                                                             */
+
+#include "types.h";
+
+u32 test_api(void);
diff --git a/programs/include/syscall.h b/programs/include/syscall.h
new file mode 100644
index 0000000..29d75c8
--- /dev/null
+++ b/programs/include/syscall.h
@@ -0,0 +1,44 @@
+/*******************************************************************************/
+/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas             */
+/*                                                                             */
+
+#define syscall0(syscall) ({ \
+	u32 _v; \
+	asm volatile (\
+	"mov %%esp,%%ecx;\
+	mov $1f,%%edx;\
+	sysenter;\
+	1:" : "=a" (_v) : "a" (syscall): "ecx","edx","memory"); \
+	_v; \
+})
+
+#define syscall1(syscall,arg1) ({ \
+	u32 _v; \
+	asm volatile (\
+	"mov %%esp,%%ecx;\
+	mov $1f,%%edx;\
+	sysenter;\
+	1:" : "=a" (_v) : "a" (syscall), "b" (arg1) : "ecx","edx","memory"); \
+	_v; \
+})
+
+#define syscall2(syscall,arg1,arg2) ({ \
+	u32 _v; \
+	asm volatile (\
+	"mov %%esp,%%ecx;\
+	mov $1f,%%edx;\
+	sysenter;\
+	1:" : "=a" (_v) : "a" (syscall), "b" (arg1), "S" (arg2) : "ecx","edx","memory"); \
+	_v; \
+})
+
+#define syscall3(syscall,arg1,arg2,arg3) ({ \
+	u32 _v; \
+	asm volatile (\
+	"mov %%esp,%%ecx;\
+	mov $1f,%%edx;\
+	sysenter;\
+	1:" : "=a" (_v) : "a" (syscall), "b" (arg1), "S" (arg2), "D" (arg3)  : "ecx","edx","memory"); \
+	_v; \
+})
+
diff --git a/programs/include/types.h b/programs/include/types.h
new file mode 100755
index 0000000..8c64667
--- /dev/null
+++ b/programs/include/types.h
@@ -0,0 +1,70 @@
+/*******************************************************************************/
+/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas             */
+/*                                                                             */
+#ifndef ALLTYPES
+# define ALLTYPES
+
+typedef char            	int8;
+typedef short           	int16;
+typedef int             	int32;
+typedef long long       	int64;
+
+typedef char	      	        BYTE;
+typedef short	      	        WORD;
+typedef long	      	        DWORD;
+typedef long long       	QWORD;
+
+typedef signed char		SBYTE;
+typedef signed short		SWORD;
+typedef signed long		SDWORD;
+typedef signed long long	SQWORD;
+
+typedef unsigned char		UBYTE;
+typedef unsigned short		UWORD;
+typedef unsigned long		UDWORD;
+typedef unsigned long long	UQWORD;
+
+typedef unsigned char	u8;
+typedef unsigned short	u16;
+typedef unsigned int	u32;
+typedef unsigned long long int	u64;
+typedef char	s8;
+typedef short	s16;
+typedef int	s32;
+typedef long int s64;
+typedef int bool; 
+
+extern char ctype[];
+
+#define true 1
+#define false 0
+#define NULL 0x0000
+
+#define CT_UP	0x01	/* upper case */
+#define CT_LOW	0x02	/* lower case */
+#define CT_DIG	0x04	/* digit */
+#define CT_CTL	0x08	/* control */
+#define CT_PUN	0x10	/* punctuation */
+#define CT_WHT	0x20	/* white space (space/cr/lf/tab) */
+#define CT_HEX	0x40	/* hex digit */
+#define CT_SP	0x80	/* hard space (0x20) */
+
+/* without the cast to unsigned, DJGPP complains (using -Wall) */
+#define isalnum(c)	((ctype + 1)[(unsigned)(c)] & (CT_UP | CT_LOW | CT_DIG))
+#define isalpha(c)	((ctype + 1)[(unsigned)(c)] & (CT_UP | CT_LOW))
+#define iscntrl(c)	((ctype + 1)[(unsigned)(c)] & (CT_CTL))
+#define isdigit(c)	((ctype + 1)[(unsigned)(c)] & (CT_DIG))
+#define isgraph(c)	((ctype + 1)[(unsigned)(c)] & (CT_PUN | CT_UP | CT_LOW | CT_DIG))
+#define islower(c)	((ctype + 1)[(unsigned)(c)] & (CT_LOW))
+#define isprint(c)	((ctype + 1)[(unsigned)(c)] & (CT_PUN | CT_UP | CT_LOW | CT_DIG | CT_SP))
+#define ispunct(c)	((ctype + 1)[(unsigned)(c)] & (CT_PUN))
+#define isspace(c)	((ctype + 1)[(unsigned)(c)] & (CT_WHT))
+#define isupper(c)	((ctype + 1)[(unsigned)(c)] & (CT_UP))
+#define isxdigit(c)	((ctype + 1)[(unsigned)(c)] & (CT_DIG | CT_HEX))
+#define isascii(c)	((unsigned)(c) <= 0x7F)
+#define toascii(c)	((unsigned)(c) & 0x7F)
+
+#define tolower(c)	(isupper(c) ? c + 'a' - 'A' : c)
+#define toupper(c)	(islower(c) ? c + 'A' - 'a' : c)
+
+#endif
diff --git a/programs/lib/libc.c b/programs/lib/libc.c
new file mode 100644
index 0000000..52e8dff
--- /dev/null
+++ b/programs/lib/libc.c
@@ -0,0 +1,12 @@
+/*******************************************************************************/
+/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas             */
+/*                                                                             */
+
+#include "libc.h";
+#include "syscall.h";
+#include "types.h";
+
+u32 test_api(void)
+{
+    syscall0(0x0);
+}
diff --git a/programs/lib/makefile b/programs/lib/makefile
new file mode 100755
index 0000000..c1da593
--- /dev/null
+++ b/programs/lib/makefile
@@ -0,0 +1,26 @@
+CC=gcc -O0 -g -nostdinc -ffreestanding -fno-builtin -Wall -w -m32 -F elf-i386 -I ../include
+LINK=ld -m elf_i386 -r -o
+SRCS= $(wildcard *.c)
+OBJS= $(SRCS:.c=.o)
+ARCH=ar rcs
+
+all: makeall
+
+makeall: libs.a
+
+libs.a:libs.o
+	$(ARCH) $@ $^
+
+libs.o:$(OBJS)
+	$(LINK) libs.o $(OBJS)
+
+.o: .c 
+	$(CC) $^
+
+clean:
+	rm -f *.o
+	rm -f *.c~
+	rm -f *.a
+
+indent: 
+	indent -linux -i8 -ts8 *.c
diff --git a/programs/linker.lds b/programs/linker.lds
new file mode 100644
index 0000000..94ee5fa
--- /dev/null
+++ b/programs/linker.lds
@@ -0,0 +1,12 @@
+OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
+OUTPUT_ARCH(i386)
+
+ENTRY(main)
+
+SECTIONS
+{
+   . = 0x40000000;
+   .text  ALIGN(16): { 
+        *(.text) 
+    }
+ }
diff --git a/programs/makefile b/programs/makefile
new file mode 100755
index 0000000..de6d50b
--- /dev/null
+++ b/programs/makefile
@@ -0,0 +1,24 @@
+CC=gcc -O0 -g -nostdinc -ffreestanding -fno-builtin -Wall -w -m32 -I ./include -c -o
+LINK=ld -m elf_i386 -T linker.lds -n -o
+SRCS= $(wildcard *.c)
+EXECS= $(SRCS:.c=)
+
+all: lib/libs.a $(EXECS) 
+
+lib/libs.a:
+	make -C lib
+
+%: %.c    
+	$(CC) $@.o $<
+	$(LINK) $@ $@.o lib/libs.a
+	chmod 644 $@
+	elfedit --output-osabi FenixOS $@
+    
+clean:
+	make -C lib clean
+	rm -f *.o
+	rm -f *.c~
+	find . -type f ! -perm /u=x -maxdepth 1 -regex '.+/\.?[^\.]+' -exec rm {} \;
+
+indent: 
+	indent -linux -i8 -ts8 *.c
diff --git a/programs/test.c b/programs/test.c
new file mode 100644
index 0000000..e62b14b
--- /dev/null
+++ b/programs/test.c
@@ -0,0 +1,11 @@
+/*******************************************************************************/
+/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas             */
+/*                                                                             */
+
+#include "libc.h";
+#include "types.h";
+
+void main(void)
+{
+    test_api();
+}