diff --git a/Discovery/File-System/OBEX_common.txt b/Discovery/File-System/OBEX_common.txt
index 3a2ea00..7e35938 100644
--- a/Discovery/File-System/OBEX_common.txt
+++ b/Discovery/File-System/OBEX_common.txt
@@ -1,17 +1,30 @@
-telecom/devinfo.txt
-telecom/rtc.txt
-telecom/pb.vcf
-telecom/pb/luid/.vcf
-telecom/pb/0.vcf
-telecom/pb/###.vcf
-telecom/pb/luid/.vcf
-telecom/pb/info.log
-telecom/pb/luid/###.log
-telecom/pb/luid/cc.log
-telecom/cal.vcs
-telecom/cal/luid/.vcs
-telecom/cal/###.vcs
-telecom/cal/luid/.vcs
-telecom/cal/info.log
-telecom/cal/luid/###.log
-telecom/cal/luid/cc.log
+# Information hardware
+telecom/devinfo.txt
+# The Real Time Clock
+telecom/rtc.txt
+# Calendar Level 2 access
+telecom/cal.vcs
+# Level 3 static index access
+telecom/cal/###.vcs
+# Add new entry, Level 4 unique index access
+telecom/cal/luid/.vcs
+# Supported properties and memory info
+telecom/cal/info.log
+# Change log
+telecom/cal/luid/###.log
+# Change counter
+telecom/cal/luid/cc.log
+# Level 2 access
+telecom/pb.vcf
+# Own business card
+telecom/pb/0.vcf
+# Level 3 static index access
+telecom/pb/###.vcf
+# Add new entry, Level 4 unique index access
+telecom/pb/luid/.vcf
+# Supported properties and memory info
+telecom/pb/info.log
+# Change log
+telecom/pb/luid/###.log
+# Change counter
+telecom/pb/luid/cc.log
\ No newline at end of file