diff --git a/bashbot.cron b/bashbot.cron
index a608261..770c393 100644
--- a/bashbot.cron
+++ b/bashbot.cron
@@ -7,7 +7,7 @@
 # This file is public domain in the USA and all free countries.
 # Elsewhere, consider it to be WTFPLv2. (wtfpl.net/txt/copying)
 #
-#### $$VERSION$$ v0.60-dev3-0-g2550aec
+#### $$VERSION$$ v0.60-dev3-8-gdec3150
 
 
 SHELL=/bin/sh
diff --git a/bashbot.rc b/bashbot.rc
index ebf016e..8625dba 100755
--- a/bashbot.rc
+++ b/bashbot.rc
@@ -1,7 +1,7 @@
 #!/bin/sh
 # description: Start or stop telegram-bash-bot
 #
-#### $$VERSION$$ v0.60-dev3-0-g2550aec
+#### $$VERSION$$ v0.60-dev3-8-gdec3150
 # shellcheck disable=SC2009
 # shellcheck disable=SC2181
 
diff --git a/bashbot.sh b/bashbot.sh
index 4b2e142..a3e6dfe 100755
--- a/bashbot.sh
+++ b/bashbot.sh
@@ -10,7 +10,7 @@
 # This file is public domain in the USA and all free countries.
 # Elsewhere, consider it to be WTFPLv2. (wtfpl.net/txt/copying)
 #
-#### $$VERSION$$ v0.60-dev3-6-g5787908
+#### $$VERSION$$ v0.60-dev3-8-gdec3150
 #
 # Exit Codes:
 # - 0 sucess (hopefully)
@@ -457,7 +457,7 @@ background() {
 
 startproc() {
 	killproc "$2"
-	local fifo="$2${copname}" # add $1 to copname, so we can have more than one running script per chat
+	local fifo="$2${copname}"
 	mkfifo "${TMPDIR:-.}/${fifo}"
 	tmux new-session -d -s "${fifo}" "$1 &>${TMPDIR:-.}/${fifo}; echo imprettydarnsuredatdisisdaendofdacmd>${TMPDIR:-.}/${fifo}"
 	tmux new-session -d -s "sendprocess_${fifo}" "bash $SCRIPT outproc ${CHAT[ID]} ${fifo}"
diff --git a/calc b/calc
new file mode 100755
index 0000000..f5f9260
--- /dev/null
+++ b/calc
@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# This file is public domain in the USA and all free countries.
+# Elsewhere, consider it to be WTFPLv2. (wtfpl.net/txt/copying)
+
+#### $$VERSION$$ v0.60-dev3-8-gdec3150
+
+# adjust your language setting here
+# https://github.com/topkecleon/telegram-bot-bash#setting-up-your-environment
+export 'LC_ALL=C.UTF-8'
+export 'LANG=C.UTF-8'
+export 'LANGUAGE=C.UTF-8'
+
+unset IFS
+# set -f # if you are paranoid use set -f to disable globbing
+
+echo 'Starting Calculator ...'
+echo 'Enter first number.'
+read -r A
+echo 'Enter second number.'
+read -r B
+echo 'Select Operation: mykeyboardstartshere "Addition" "Subtraction" "Multiplication" "Division" "Cancel"'
+read -r opt
+echo -n 'Result: '
+case $opt in
+	'add'* | 'Add'* ) expr $A + $B ;;
+	'sub'* | 'Sub'* ) expr $A - $B ;;
+	'mul'* | 'Mul'* ) expr $A \* $B ;;
+	'div'* | 'Div'* ) expr $A / $B ;;
+	'can'* | 'Can'* ) echo "abort!" ;;
+		* ) echo "unknown operator!";;
+esac
+echo "Bye .."