diff --git a/reference/ArrayCtrlSorting/ArrayCtrlSorting.upp b/reference/ArrayCtrlSorting/ArrayCtrlSorting.upp
index 5872304d3..5fd01cace 100644
--- a/reference/ArrayCtrlSorting/ArrayCtrlSorting.upp
+++ b/reference/ArrayCtrlSorting/ArrayCtrlSorting.upp
@@ -1,3 +1,5 @@
+description "Sorting columns in ArrayCtrl\377";
+
 uses
 	CtrlLib;
 
diff --git a/reference/AsyncWork/AsyncWork.cpp b/reference/AsyncWork/AsyncWork.cpp
new file mode 100644
index 000000000..b15b17153
--- /dev/null
+++ b/reference/AsyncWork/AsyncWork.cpp
@@ -0,0 +1,37 @@
+#include <Core/Core.h>
+
+using namespace Upp;
+
+CONSOLE_APP_MAIN
+{
+	StdLogSetup(LOG_FILE|LOG_COUT);
+	
+	auto a = Async([](int n) -> double {
+		double f = 1;
+		for(int i = 2; i <= n; i++)
+			f *= i;
+		return f;
+	}, 100); // Schedules job to be executed by threadpool, returns AsyncWork for the return value and job control
+	
+	DUMP(a.Get()); // Makes sure job is finished (can execute it if it has not started yet), returns the result
+	
+	auto b = Async([] { throw "error"; });
+	
+	try {
+		b.Get(); // exception is propagated
+	}
+	catch(...) {
+		LOG("Exception has been caught");
+	}
+	
+	
+	auto c = Async([] {
+		for(;;)
+			if(CoWork::IsCanceled()) {
+				LOG("Work was canceled");
+				break;
+			}
+	});
+	Sleep(100); // make it chance to start
+	// c destructor cancels the work (can be explicitly canceled by Cancel method too)
+}
diff --git a/reference/AsyncWork/AsyncWork.upp b/reference/AsyncWork/AsyncWork.upp
new file mode 100644
index 000000000..0926e969e
--- /dev/null
+++ b/reference/AsyncWork/AsyncWork.upp
@@ -0,0 +1,11 @@
+description "AsyncWork is U++ variant of std::future mechanism\377";
+
+uses
+	Core;
+
+file
+	AsyncWork.cpp;
+
+mainconfig
+	"" = "";
+
diff --git a/reference/EncodeDecode/EncodeDecode.upp b/reference/EncodeDecode/EncodeDecode.upp
index 74ffbd776..602c8d451 100644
--- a/reference/EncodeDecode/EncodeDecode.upp
+++ b/reference/EncodeDecode/EncodeDecode.upp
@@ -1,3 +1,5 @@
+description "Web related encoding / decoding routines\377";
+
 uses
 	Core;