--- a/AbstractOperatingSystem.st	Tue Nov 08 20:12:13 2016 +0100
+++ b/AbstractOperatingSystem.st	Tue Nov 08 20:16:11 2016 +0100
@@ -1,5 +1,3 @@
-"{ Encoding: utf8 }"
-
 "
  COPYRIGHT (c) 1988 by Claus Gittinger
 	      All Rights Reserved
@@ -962,6 +960,25 @@
 
 startProcess:aCommandString inputFrom:anExternalInStream outputTo:anExternalOutStream
     errorTo:anExternalErrStream auxFrom:anExternalAuxStreamOrNil environment:environment 
+    inDirectory:dir newPgrp:newPgrp showWindow:showWindowBooleanOrNil
+
+    "start executing the OS command as specified by the argument, aCommandString
+     as a separate process; do not wait for the command to finish.
+     The commandString is passed to a shell for execution - see the description of
+     'sh -c' in your UNIX manual ('cmd.com' in your MSDOS manual).
+     The command gets stdIn, stdOut and stdErr assigned from the arguments;
+     each may be nil.
+     Return the processId if successful, nil otherwise.
+     Use #monitorPid:action: for synchronization and exec status return,
+     or #killProcess: to stop it."
+
+    "raise an error: must be redefined in concrete subclass(es)"
+
+    ^ self subclassResponsibility
+!
+
+startProcess:aCommandString inputFrom:anExternalInStream outputTo:anExternalOutStream
+    errorTo:anExternalErrStream auxFrom:anExternalAuxStreamOrNil environment:environment 
     inDirectory:dir showWindow:showWindowBooleanOrNil
 
     "start executing the OS command as specified by the argument, aCommandString