diff --git a/build.php b/build.php
index ed4b96f619b678514d962342b57257a0c8dc8740..71494edce31d8b5b2e26429b2c2609a3093feb5c 100755
--- a/build.php
+++ b/build.php
@@ -32,7 +32,7 @@ if(isset($ARGS['-h']) || isset($ARGS['--help'])){
     - Merge PHP sources to a single file
     - Compile binary
     - Test binary
-    - Coy to architecture specific binary
+    - Copy to architecture specific binary
     - Create readme with buildinfos
 
 ...............................................................................
diff --git a/docs/80_Build.md b/docs/80_Build.md
index 298dac73b9c77923f97f291002d8879974e5f5dd..d22200caf3436638a7637102d65afe22936ebcf7 100644
--- a/docs/80_Build.md
+++ b/docs/80_Build.md
@@ -7,6 +7,16 @@
 </html>
 <!-- END-ADD-TTY-PLAYER -->
 
+## Introduction
+
+The compilation to a platform specific binary is done with `spc`.
+
+Website: <https://static-php.dev/>
+
+We need to prepare an environment to let do it its work.
+
+Additionally you need a PHP installation to modify php sources and to start installer and build script.
+
 ## Requirements
 
 ### Linux
@@ -60,7 +70,7 @@ You get this initial structure:
 
 ### Installer
 
-Run the `./installer.php` to download apmonitor source and spc. It prepares the micro build and creates a merged php file of all appmonitor client checks. This script has command line parameter support.
+Run the `./installer.php` to download IML Appmonitor source and spc. It prepares the micro build and creates a merged php file of all appmonitor client checks. This script has command line parameter support.
 
 ```txt
 ./installer.php -h
@@ -137,7 +147,7 @@ To build the amcli binary start `./build.php`. This script has command line para
     - Merge PHP sources to a single file
     - Compile binary
     - Test binary
-    - Coy to architecture specific binary
+    - Copy to architecture specific binary
     - Create readme with buildinfos
 
 ...............................................................................