diff --git a/abrechenbarkeit.lua b/abrechenbarkeit.lua
index 1243d06..2ebafc3 100755
--- a/abrechenbarkeit.lua
+++ b/abrechenbarkeit.lua
@@ -30,6 +30,7 @@ local matchers = {
     barcode = "([%w_-]+)",
     barcode_opt = "([%w_-]*)",
     name = "([%w_ -]+)",
+    name_opt = "([%w_ -]*)",
 }
 local matchers_global = (function()
     local s = {}
@@ -142,6 +143,26 @@ local function format_amount(amount, tag, classes)
         })
 end
 
+local function format_list(list)
+	if list == nil then
+		return nil
+	end
+
+	local not_first = false
+	local out = ""
+	for _, barcode in pairs(list) do
+		if not_first then
+			out = out .. ", " .. barcode
+		else 
+			out = barcode
+		end
+
+		not_first = true
+	end
+
+	return out
+end
+
 local function get_user_theme(username)
     local c = ""
     if username == "_jeb" then
@@ -254,9 +275,9 @@ local function read_log()
         if l == "" or l == nil then
             return nil
         end
-        local time, user_src, user_dst, amount, pcode, pcount, comment = string.match(l,
-            format("^{time},{user},{user},{amount},{barcode_opt},{amount_opt},{comment_opt}$", matchers))
-        return tonumber(time), user_src, user_dst, tonumber(amount), pcode, tonumber(pcount), comment
+        local time, user_src, user_dst, amount, pname, pcount, comment = string.match(l,
+            format("^{time},{user},{user},{amount},{name_opt},{amount_opt},{comment_opt}$", matchers))
+        return tonumber(time), user_src, user_dst, tonumber(amount), pname, tonumber(pcount), comment
     end
 end
 
@@ -271,8 +292,24 @@ local function read_products()
         if l == "" or l == nil then
             return nil
         end
-        local barcode, price, user, name = string.match(l, format("^{barcode},{amount},{user_opt},{name}$", matchers))
-        return barcode, tonumber(price), user, name
+        local price, user, name = string.match(l, format("^{amount},{user_opt},{name}$", matchers))
+        return tonumber(price), user, name
+    end
+end
+
+local function read_barcodes()
+    local log = io.open("barcodes", "r")
+    if log == nil then
+        return function() return nil end
+    end
+    local lines = log:lines("l")
+    return function()
+        local l = lines()
+        if l == "" or l == nil then
+            return nil
+        end
+        local name, barcode = string.match(l, format("^{name},{barcode}$", matchers))
+        return name, barcode
     end
 end
 
@@ -336,10 +373,25 @@ local function r_transaction_post()
     local pcode = data.pcode
     local pcount = tonumber(data.pcount)
     local comment = data.comment
+	local barcode_name = nil
+    
     if pcode ~= nil and pcode ~= "" then
+		-- check if barcode exists
+		local exists = false
+		for p_name, p_barcode in read_barcodes() do
+			if p_barcode == pcode then
+				exists = true
+				barcode_name = p_name
+			end
+		end
+        if not exists then
+            return error_box("{+error.unknown_barcode}")
+        end
+    
+    	-- check if product exists
         local exists = false
-        for p_barcode, p_amount, p_user, p_name in read_products() do
-            if p_barcode == pcode then
+        for p_amount, p_user, p_name in read_products() do
+            if barcode_name == p_name then
                 pcount = (tonumber(data.pcount) or 1) * (data.negate_pcount ~= nil and -1 or 1)
                 amount = amount or pcount * p_amount
                 user_src = user_src or p_user
@@ -349,9 +401,11 @@ local function r_transaction_post()
             end
         end
         if not exists then
-            return error_box("{+error.unknown_product}")
+            return error_box("{+error.unknown_product}"..barcode_name)
         end
     end
+
+	-- for outside money
     user_src = user_src or "@Potential"
     if amount == nil then
         return error_box("{+error.invalid_amount}")
@@ -371,7 +425,7 @@ local function r_transaction_post()
     end
     local time = os.time()
     log:write(string.format("%d,%s,%s,%d,%s,%s,%s\n",
-        time, user_src, user_dst, amount, pcode or "", pcount or "", comment))
+        time, user_src, user_dst, amount, barcode_name or "", pcount or "", comment))
     log:flush()
     log:close()
     return format([[
@@ -644,23 +698,41 @@ end
 
 local function r_products_post()
     local data = form_data()
-    local barcode = data.barcode
-    if barcode == nil or barcode:match("^[%w_-]*$") == nil then
-        return error_box("{+error.invalid_barcode}")
+    local name = data.name
+    if name == nil or name:match("^[%w_-]*$") == nil then
+        return error_box("{+error.invalid_name}")
     end
+    
     if data.delete then
         local new_products = io.open("products.new", "w+")
         if new_products == nil then
             return error_box("{+error.open_new_products}")
         end
-        for a_barcode, price, user, name in read_products() do
-            if barcode ~= a_barcode then
-                new_products:write(string.format("%s,%d,%s,%s\n", a_barcode, price, user, name))
+        for price, user, a_name in read_products() do
+            if name ~= a_name then
+                new_products:write(string.format("%d,%s,%s\n", price, user, name))
             end
         end
         new_products:flush()
         new_products:close()
         os.rename("products.new", "products")
+    elseif data.addbarcode then
+    	-- add barcode
+    	local name = data.name
+    	local barcode = data.barcode
+        if name == nil or name:match(matchers_global.name) == nil then
+            return error_box("{+error.invalid_name}")
+        end
+        if barcode == nil or barcode:match(matchers_global.barcode) == nil then
+            return error_box("{+error.invalid_barcode}")
+        end
+    	local barcodes = io.open("barcodes", "a+")
+    	if barcodes == nil then
+    		return error_box("{+error.open_barcodes}")
+    	end
+    	barcodes:write(string.format("%s,%s\n", name, barcode))
+        barcodes:flush()
+        barcodes:close()
     else
         local price = tonumber(data.price)
         local name = data.name
@@ -678,7 +750,7 @@ local function r_products_post()
         if products == nil then
             return error_box("{+error.open_products}")
         end
-        products:write(string.format("%s,%d,%s,%s\n", barcode, price, user, name))
+        products:write(string.format("%d,%s,%s\n", price, user, name))
         products:flush()
         products:close()
     end
@@ -702,6 +774,23 @@ local function r_products()
                 <input type="number" name="price" id="price" />
                 <label for="user">{+field.user}: </label>
                 <input type="text" name="user" id="user" />
+                <input type="submit" value="{+products.form.add.submit}" class="amount-ntr button" />
+            </form>
+            <form action="/?products" method="POST" class="box backgroundbox">
+                <h3>{+products.form.addbarcode}</h3>
+                <input type="text" name="addbarcode" value="1" hidden />
+                <label for="name">{+field.name}: </label>
+                <select type="text" name="name" id="name">
+		]], {
+			currency = config.unit or "€",
+        }))
+        for _, _, name in read_products() do
+			print(format([[<option name="{name}">{name}</option>]], {
+				name = name,
+			}))
+		end
+        
+		print(format([[</select>
                 <label for="barcode">{+field.barcode}: </label>
                 <input type="text" name="barcode" id="barcode" />
                 <input type="submit" value="{+products.form.add.submit}" class="amount-ntr button" />
@@ -709,8 +798,51 @@ local function r_products()
             <form action="/?products" method="POST" class="box backgroundbox">
                 <h3>{+products.form.remove}</h3>
                 <input type="text" name="delete" value="1" hidden />
+                <label for="name">{+field.name}: </label>
+                <select type="text" name="name" id="name">
+		]], {
+			currency = config.unit or "€",
+        }))
+        for _, _, name in read_products() do
+			print(format([[<option name="{name}">{!name}</option>]], {
+				name = name,
+			}))
+		end
+		print(format([[</select>
+                <input type="submit" value="{+products.form.remove.submit}" class="amount-ntr button" />
+            </form>
+            <!-- remove barcode  -->
+            <form action="/?products" method="POST" class="box backgroundbox">
+                <h3>{+products.form.removebarcode}</h3>
+                <input type="text" name="delete" value="1" hidden />
                 <label for="barcode">{+field.barcode}: </label>
-                <input type="text" name="barcode" id="barcode" />
+                <select type="text" name="barcode" id="barcode">
+		]], {
+			currency = config.unit or "€",
+        }))
+        
+        local barcodes = {}
+        for name, barcode in read_barcodes() do
+			print(format([[<option name="{barcode}">{!barcode} ({!name})</option>]], {
+				name = name,
+				barcode = barcode,
+			}))
+			if barcodes[name] ~= nil then
+				table.insert(barcodes[name], barcode)
+			else
+				barcodes[name] = {}
+				table.insert(barcodes[name], barcode)				
+			end
+		end
+
+		for a, b in pairs(barcodes) do
+			print("name: " .. a)
+			for _, c in pairs(b) do
+				print("\t"..c)
+			end
+		end
+        
+		print(format([[</select>
                 <input type="submit" value="{+products.form.remove.submit}" class="amount-ntr button" />
             </form>
             </div>
@@ -720,26 +852,27 @@ local function r_products()
         print(format([[<table class="productlist"><tr>
             <th>{+field.name}</th>
             <th>{+field.price}</th>
-            <th>{+field.barcode}</th>
             <th>{+field.count}</th>
             <th>{+field.user}</th>
+            <th>{+field.barcode}</th>
         </tr>]]))
         local pbals = product_balances()
-        for barcode, price, user, name in read_products() do
+        for price, user, name in read_products() do
             print(format([[<tr>
                 <td>{!name}</td>
                 {price}
-                <td>{!barcode}</td>
                 <td>{!count}</td>
                 <td>{!user}</td>
+                <td>{barcodes}</td>
             </tr>]], {
                 name = name,
                 price = format_amount(-price, "td"),
-                barcode = barcode,
                 count = tostring(pbals[barcode] or 0),
                 user = user,
+                barcodes = format_list(barcodes[name]) or "{+field.not_set}",
             }))
-        end
+		end
+        
         print("</table>")
     end)
 end
diff --git a/locale/en.ini b/locale/en.ini
index 98dffee..d051b50 100644
--- a/locale/en.ini
+++ b/locale/en.ini
@@ -16,14 +16,17 @@ field.time=Time
 field.upstream_price=Upstream Price
 field.user=User
 field.username=Username
+field.not_set=Not Set
 index.form.create_user.submit=Continue
 index.form.create_user=User Creation
 log.actions.revert=Revert
 log.actions=Actions
 log=Log
 products.form.add=Add Product
+products.form.addbarcode=Add Barcode
 products.form.add.submit=Add
 products.form.remove=Remove Product
+products.form.removebarcode=Remove Barcode
 products.form.remove.submit=Remove
 products.form.title=Product List
 products.title=Product List
@@ -55,6 +58,7 @@ users=Users
 user.special=This is a special user.
 users.filter=Filter
 error.unknown_product=Unknown product
+error.unknown_barcode=Unknown barcode
 error.invalid_amount=Amount invalid
 error.invalid_comment=Comment invalid
 error.invalid_user_src=Source user invalid
@@ -66,6 +70,7 @@ error.open_new_products=Failed to open new products file
 error.invalid_price=Price invalid
 error.invalid_name=Name invalid
 error.open_products=Failed to open products file
+error.open_barcodes=Failed to open barcodes file
 error.no_path=No path
 users.inactive_list=Inactive Users
 users.embezzlement=A total of {amount} are currently under embezzlement.