diff --git a/Snippet:-Hardware-Constants.md b/Snippet:-Constants.md
similarity index 90%
rename from Snippet:-Hardware-Constants.md
rename to Snippet:-Constants.md
index 1122048..99132f9 100644
--- a/Snippet:-Hardware-Constants.md
+++ b/Snippet:-Constants.md
@@ -69,6 +69,18 @@ CLOCK_POLL equ 0
 FLOPPY_POLL         equ 1
 FLOPPY_READ_SECTOR  equ 2
 FLOPPY_WRITE_SECTOR equ 3
+
+;*************************** Keys IDs
+KEY_A equ 0x41
+KEY_B equ 0x42
+KEY_C equ 0x43
+KEY_D equ 0x44
+KEY_E equ 0x45
+
+;*************************** Items IDs
+ITEM_ID_BIOMASS equ 1
+ITEM_ID_IRON    equ 2 ; NOT DEFINED YET IS ASSUMPTION
+ITEM_ID_COPPER  equ 3 ; NOT DEFINED YET IS ASSUMPTION
 ```
 
 #### Example