diff --git a/Facebook/command_line_cheat_sheet.md b/Facebook/command_line_cheat_sheet.md
index baabcff..d428b25 100644
--- a/Facebook/command_line_cheat_sheet.md
+++ b/Facebook/command_line_cheat_sheet.md
@@ -41,6 +41,8 @@ SHOW SCHEMAS;                   |
 # Systems
 |
 -|-
+**Service**                     |
+smc                             | service discovery service
 **Data**                        |
  ODS                            | tiem series (guts)
  Scribe                         | log distributor