diff --git a/cop/collection.go b/cop/collection.go
index c13a7b0..476cf32 100644
--- a/cop/collection.go
+++ b/cop/collection.go
@@ -1,18 +1,19 @@
 package cop
 
 import (
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io/fs"
 	"log"
 	"os"
-	"os/user"
 	"path"
 	"path/filepath"
 	"strings"
 
 	"github.com/go-git/go-git/v5"
 
+	"gitea.mmo.to/ppForge/ppforge/globals"
 	"gitea.mmo.to/ppForge/ppforge/protocol"
 )
 
@@ -21,6 +22,30 @@ type ProtocolCollectionList struct {
 	PCs []COP
 }
 
+// WriteCache updates the cache file of the available protocols
+func (pcl *ProtocolCollectionList) WriteCache() error {
+	// [impl->dsn~protocol-collection-cache~0>>utest]
+	data, err := json.MarshalIndent(*pcl, "", "  ")
+	if err != nil {
+		return err
+	}
+	err = os.WriteFile(path.Join(globals.CollectionOfProtocolsDir, globals.COPCacheFileName), data, fs.ModeAppend)
+	return err
+}
+
+// ReadCache reads the cache for display
+func (pcl *ProtocolCollectionList) ReadCache() error {
+	// [impl->dsn~protocol-collection-cache~0>>utest]
+	// TODO: Think about if it makes sense to have this function as a member of PCL,
+	// 		 or if it makes more sense to make this function standalone and return a new PCL?
+	data, err := os.ReadFile(path.Join(globals.CollectionOfProtocolsDir, globals.COPCacheFileName))
+	if err != nil {
+		return err
+	}
+	err = json.Unmarshal(data, pcl)
+	return err
+}
+
 // ProtocolCollectionEntry is a single entry in the file database, additionally to the meta data the path is required
 type ProtocolCollectionEntry struct {
 	Path     string
@@ -32,25 +57,14 @@ func Init() *ProtocolCollectionList {
 	// initialize main list
 	databases := ProtocolCollectionList{[]COP{}}
 	// initialize default db
-	user, err := user.Current()
-	if err != nil {
-		log.Printf("Current user not obtainable: %s", err)
-		log.Fatal("Impossible to open default database")
-	}
-	pathlist := []string{user.HomeDir, ".config", "ppforge", "cop"}
-	fdb := FileCOP{COP{map[string]ProtocolCollectionEntry{}, false}, path.Join(pathlist...)}
-	fdb.Open(path.Join(pathlist...))
-	fdb.UpdateCollection()
+	fdb := FileCOP{COP{map[string]ProtocolCollectionEntry{}, false}, globals.CollectionOfProtocolsDir}
+	fdb.Open(globals.CollectionOfProtocolsDir)
+	fdb.Sync()
 	databases.PCs = append(databases.PCs, fdb.COP)
 	log.Printf("Amount of databases available %d", len(databases.PCs))
 	return &databases
 }
 
-// Get a full protocol from a database entry
-func (de *ProtocolCollectionEntry) Get() (*protocol.Protocol, error) {
-	return protocol.LoadNew(de.Path)
-}
-
 // COP represents a Collection of Protocols
 type COP struct {
 	protocols map[string]ProtocolCollectionEntry
@@ -98,7 +112,7 @@ func (fd *FileCOP) Protocols() ([]ProtocolCollectionEntry, error) {
 	entries := []ProtocolCollectionEntry{}
 	if !fd.closed && len(fd.protocols) == 0 {
 		fd.protocols = map[string]ProtocolCollectionEntry{}
-		err := fd.UpdateCollection()
+		err := fd.Sync()
 		if err != nil {
 			return nil, err
 		}
@@ -137,10 +151,10 @@ func (fd *FileCOP) Update(prot *protocol.Protocol) error {
 	return fd.Add(prot)
 }
 
-// UpdateCollection just rereads all files
-func (fd *FileCOP) UpdateCollection() error {
+// Sync just rereads all files
+func (fd *FileCOP) Sync() error {
 	if fd.closed {
-		return errors.New("Cannot update, FileCOP is closed")
+		return errors.New("Cannot sync, FileCOP is closed")
 	}
 	// recurse recursively through the path
 	if fd.protocols == nil {
diff --git a/cop/collection_test.go b/cop/collection_test.go
index b9f197d..fadfea7 100644
--- a/cop/collection_test.go
+++ b/cop/collection_test.go
@@ -51,7 +51,7 @@ func TestClosed(t *testing.T) {
 		fmt.Println("Update did not deliver error")
 		t.Fail()
 	}
-	err = fcop.UpdateCollection()
+	err = fcop.Sync()
 	if err == nil {
 		fmt.Println("UpdateCollection did not deliver error")
 		t.Fail()
diff --git a/globals/globals.go b/globals/globals.go
new file mode 100644
index 0000000..65e49d9
--- /dev/null
+++ b/globals/globals.go
@@ -0,0 +1,19 @@
+package globals
+
+// Global variables, Mocks, etc.
+// This package shall not have any dependency towards the application itself!
+// [impl->dsn~properly-defined-globals~1>>utest]
+
+// GLOBAL VARIABLES
+
+// ConfigDirectoryList Configuration directory list
+var ConfigDirectoryList []string
+
+// ConfigDirectory Configuration directory string
+var ConfigDirectory string
+
+// CollectionOfProtocolsDir is the default directory for protocol collections
+var CollectionOfProtocolsDir string
+
+// COPCacheFileName
+var COPCacheFileName string = "cop-cache.json"
diff --git a/globals/globals.linux.go b/globals/globals.linux.go
new file mode 100644
index 0000000..6c4065f
--- /dev/null
+++ b/globals/globals.linux.go
@@ -0,0 +1,25 @@
+package globals
+
+// Global variables, Mocks, etc.
+// This package shall not have any dependency towards the application itself!
+import (
+	"log"
+	"os/user"
+	"path"
+)
+
+func init() {
+	user, err := user.Current()
+	if err != nil {
+		log.Printf("Current user not obtainable: %s", err)
+		log.Fatal("Impossible to open default database")
+	}
+
+	// ConfigDirectoryList Configuration directory list Linux
+	ConfigDirectoryList = []string{user.HomeDir, ".config", "ppforge"}
+
+	// ConfigDirectory Configuration directory string Linux
+	ConfigDirectory = path.Join(ConfigDirectoryList...)
+
+	CollectionOfProtocolsDir = path.Join(append(ConfigDirectoryList, "cop")...)
+}
diff --git a/globals/globals.windows.go b/globals/globals.windows.go
new file mode 100644
index 0000000..cfd6a80
--- /dev/null
+++ b/globals/globals.windows.go
@@ -0,0 +1,16 @@
+package globals
+
+// Global variables, Mocks, etc.
+// This package shall not have any dependency towards the application itself!
+import (
+	"os/user"
+	"path"
+)
+
+func init() {
+	// ConfigDirectoryList Configuration directory list Windows TODO
+	var ConfigDirectoryList []string = []string{user.HomeDir, TODO!!!}
+
+	// ConfigDirectory Configuration directory string Windows
+	var ConfigDirectory string = path.Join(ConfigDirectoryList...)
+}