diff --git a/autouser.sh b/autouser.sh
index ab00fc9..82efca6 100755
--- a/autouser.sh
+++ b/autouser.sh
@@ -6,6 +6,22 @@ if [[ ! -f "$FILE" ]]; then
   exit
 fi
 
+# User '.csv' columns
+COL_USERNAME="1"
+COL_FULLNAME="2"
+COL_USERUID="3"
+COL_USERGID="4"
+COL_USERGROUPS="5"
+COL_TLFN="6"
+COL_EXTRAINFO="7"
+COL_USERSHELL="8"
+COL_USERLOCKED="9"
+
+# Group '.csv' columns
+COL_GROUPNAME="1"
+COL_GROUPGID="2"
+
+# Control variables
 DRYRUN=false
 FILE_CONTENTS="$(cat ${@: -1})"
 CREATE_USERS=false
@@ -49,8 +65,8 @@ turnLowercase()
 createGroups ()
 {
   while read line; do
-    GID=$(cutter "${line}" "2")
-    GROUPNAME=$(turnLowercase $(cutter "${line}" "1"))
+    GID=$(cutter "${line}" "$COL_GROUPGID")
+    GROUPNAME=$(turnLowercase $(cutter "${line}" "$COL_GROUPNAME"))
       if [[ -z "$GID" ]]; then
         echo "[+] Adding group $GROUPNAME..."
         groupadd $GROUPNAME
@@ -64,8 +80,8 @@ createGroups ()
 createGroupsDry ()
 {
   while read line; do
-    GID=$(cutter "${line}" "2")
-    GROUPNAME=$(turnLowercase $(cutter "${line}" "1"))
+    GID=$(cutter "${line}" "$COL_GROUPGID")
+    GROUPNAME=$(turnLowercase $(cutter "${line}" "$COL_GROUPNAME"))
        if [[ -z "$GID" ]]; then
            echo "groupadd $GROUPNAME"
        else
@@ -77,7 +93,7 @@ createGroupsDry ()
 deleteGroups ()
 {
   while read line; do
-    GROUPNAME=$(turnLowercase $(cutter "${line}" "1"))
+    GROUPNAME=$(turnLowercase $(cutter "${line}" "$COL_GROUPNAME"))
     echo "[+] Deleting group $GROUPNAME..."
     groupdel $GROUPNAME
   done <<< "$FILE_CONTENTS"
@@ -86,7 +102,7 @@ deleteGroups ()
 deleteGroupsDry ()
 {
   while read line; do
-    GROUPNAME=$(turnLowercase $(cutter "${line}" "1"))
+    GROUPNAME=$(turnLowercase $(cutter "${line}" "$COL_GROUPNAME"))
     echo "groupdel $GROUPNAME"
   done <<< "$FILE_CONTENTS"
 }
@@ -94,15 +110,15 @@ deleteGroupsDry ()
 createUsers ()
 {
   while read line; do
-    USERNAME=$(turnLowercase $(cutter "${line}" "1"))
-    FULLNAME=$(cutter "${line}" "2")
-    USERUID=$(cutter "${line}" "3")
-    USERGID=$(turnLowercase $(cutter "${line}" "4"))
-    USERGROUPS=$(turnLowercase $(cutter "${line}" "5"))
-    TLFN=$(cutter "${line}" "6")
-    EXTRAINFO=$(cutter "${line}" "7")
-    USERSHELL=$(cutter "${line}" "8")
-    USERLOCKED=$(cutter "${line}" "9")
+    USERNAME=$(turnLowercase $(cutter "${line}" "$COL_USERNAME"))
+    FULLNAME=$(cutter "${line}" "$COL_FULLNAME")
+    USERUID=$(cutter "${line}" "$COL_USERUID")
+    USERGID=$(turnLowercase $(cutter "${line}" "$COL_USERGID"))
+    USERGROUPS=$(turnLowercase $(cutter "${line}" "$COL_USERGROUPS"))
+    TLFN=$(cutter "${line}" "$COL_TLFN")
+    EXTRAINFO=$(cutter "${line}" "$COL_EXTRAINFO")
+    USERSHELL=$(cutter "${line}" "$COL_USERSHELL")
+    USERLOCKED=$(cutter "${line}" "$COL_USERLOCKED")
 
     echo "[+] Adding user $USERNAME..."
     useradd -m $USERNAME
@@ -147,15 +163,15 @@ createUsers ()
 createUsersDry ()
 {
   while read line; do
-    USERNAME=$(turnLowercase $(cutter "${line}" "1"))
-    FULLNAME=$(cutter "${line}" "2")
-    USERUID=$(cutter "${line}" "3")
-    USERGID=$(turnLowercase $(cutter "${line}" "4"))
-    USERGROUPS=$(turnLowercase $(cutter "${line}" "5"))
-    TLFN=$(cutter "${line}" "6")
-    EXTRAINFO=$(cutter "${line}" "7")
-    USERSHELL=$(cutter "${line}" "8")
-    USERLOCKED=$(cutter "${line}" "9")
+    USERNAME=$(turnLowercase $(cutter "${line}" "$COL_USERNAME"))
+    FULLNAME=$(cutter "${line}" "$COL_FULLNAME")
+    USERUID=$(cutter "${line}" "$COL_USERUID")
+    USERGID=$(turnLowercase $(cutter "${line}" "$COL_USERGID"))
+    USERGROUPS=$(turnLowercase $(cutter "${line}" "$COL_USERGROUPS"))
+    TLFN=$(cutter "${line}" "$COL_TLFN")
+    EXTRAINFO=$(cutter "${line}" "$COL_EXTRAINFO")
+    USERSHELL=$(cutter "${line}" "$COL_USERSHELL")
+    USERLOCKED=$(cutter "${line}" "$COL_USERLOCKED")
 
     echo "useradd -m $USERNAME"
     echo "echo \"$USERNAME:$USERNAME | chpasswd\""
@@ -199,7 +215,7 @@ createUsersDry ()
 deleteUsers ()
 {
   while read line; do
-    USERNAME=$(turnLowercase $(cutter "${line}" "1"))
+    USERNAME=$(turnLowercase $(cutter "${line}" "$COL_USERNAME"))
     echo "[+] Deleting user $USERNAME..."
     userdel -r $USERNAME 2>/dev/null
     groupdel $USERNAME 2>/dev/null
@@ -209,7 +225,7 @@ deleteUsers ()
 deleteUsersDry ()
 {
   while read line; do
-    USERNAME=$(turnLowercase $(cutter "${line}" "1"))
+    USERNAME=$(turnLowercase $(cutter "${line}" "$COL_USERNAME"))
     echo "userdel -r $USERNAME"
     echo "groupdel $USERNAME"
   done <<< "$FILE_CONTENTS"