diff --git a/README.md b/README.md
index e17d2d9..593a39e 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,12 @@ ee41f2901353c16738932a090a82a2e8a631e3c6526ac6a0325ee29bb99eb2af  rechercheDoubl
 df2dfd675abb0742ff838fe0467776f3c1d06c6829bfd905dbd663356640c18a  syllabes.sh.asc
 c30a4343a66aeef47c6bd6a9dfefa3e0d618e8c960a64878d643bdb3378eb936  functions.inc
 afa9d91fac7b8317c47d18f054f512107cd5034de4c69b5672962e6b1d564103  functions.inc.asc
+5b745b2c7897c0c07bd33d7467adb837588bd412d4eea107b758586e2c0522b2  fibonacci.php
+2b917506ec9732c1272df4345a16bfecd0dce54754fd7c40eb7830a3653a4818  fibonacci.php.asc
+d41722d8fb508f584b063d7bf0e8d1c19a119d62deba46245f8afdd4766ef391  fibonacci.py
+07ef45ae9fb104c64f9a150c0fadd8c99068f191c80378b415b1f1531ac70812  fibonacci.py.asc
+560b6b2b3446cb7c7fd26f6576d4e469890791dbb94db9254f446c9e304c50f3  fibonacci.sh
+d91fac27b81d7fc938281630ee405f75da3a6869e6e95955e7ea7bc756dce939  fibonacci.sh.asc
 
 syllabes.sh
 =============
diff --git a/fibonacci.php b/fibonacci.php
new file mode 100755
index 0000000..2f0b35a
--- /dev/null
+++ b/fibonacci.php
@@ -0,0 +1,24 @@
+#!/usr/bin/env php
+
+<?php
+
+if(! isset($argv[1]) || ! is_numeric($argv[1]) || intval($argv[1]) <= 0){
+	printf("Usage: %s nbr_int
+    nbr_int: Un nombre entier supérieur à 0\n", $argv[0]);
+	exit(1);
+}
+
+$nbr_int = intval($argv[1]);
+
+$a = 0;
+$b = 1;
+
+while ($b < $nbr_int) {
+	printf("%d\n", $b);
+	$b = $a + $b;
+	$a = $b - $a;
+}
+
+printf("b/a = %1.15f\n", $b/$a);
+
+exit(0);
diff --git a/fibonacci.php.asc b/fibonacci.php.asc
new file mode 100644
index 0000000..2d55af8
--- /dev/null
+++ b/fibonacci.php.asc
@@ -0,0 +1,11 @@
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diff --git a/fibonacci.py b/fibonacci.py
new file mode 100755
index 0000000..6595c2d
--- /dev/null
+++ b/fibonacci.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import sys
+
+if len(sys.argv) == 1 or not sys.argv[1].isnumeric() or int(sys.argv[1]) <= 0:
+	msg = """\
+Usage: {:s} nbr_int
+    nbr_int: Un nombre entier supérieur à 0""".format(sys.argv[0])
+	print(msg)
+	sys.exit(1)
+
+a,b = 0,1
+
+while b < int(sys.argv[1]):
+	print(b)
+	a,b = b,a+b
+
+print("b/a = {:1.15f}".format(b/a))
+
+sys.exit(0)
diff --git a/fibonacci.py.asc b/fibonacci.py.asc
new file mode 100644
index 0000000..e859f96
--- /dev/null
+++ b/fibonacci.py.asc
@@ -0,0 +1,11 @@
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diff --git a/fibonacci.sh b/fibonacci.sh
new file mode 100755
index 0000000..1bd3a3f
--- /dev/null
+++ b/fibonacci.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+
+#set -x
+
+PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"
+
+function is_int {
+	if grep -E -v -q "^-?[0-9]+$" <<< $1; then
+		return 1
+	fi
+	return 0
+}
+
+if [ -z $1 ] || ! is_int $1 || (($1 <= 0)); then 
+	printf "\
+Usage: %s nbr_int
+    nbr_int: Un nombre entier supérieur à 0\n" $0 
+	exit 1
+fi
+
+a=0
+b=1
+
+while (($b < $1)); do
+	printf "%d\n" $b
+	((b=a+b))
+	((a=b-a))
+done
+
+printf "b/a = %1.15f\n" $(echo $b/$a | bc -l)
+
+exit 0
diff --git a/fibonacci.sh.asc b/fibonacci.sh.asc
new file mode 100644
index 0000000..94dc6ed
--- /dev/null
+++ b/fibonacci.sh.asc
@@ -0,0 +1,11 @@
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