Assorted website link fixes

pubs/pc/software/os2/microsoft/README.md

@@ -0,0 +1,21 @@
+---
+layout: page
+title: Microsoft OS/2 Software Guides
+permalink: /pubs/pc/software/os2/microsoft/
+redirect_from:
+  - /pubs/pc/programming/os2/
+---
+
+Microsoft OS/2 Software Development Guides
+---
+
+For OS/2 1.0:
+
+* [Microsoft® Operating System/2 Programmer’s Toolkit](/pubs/pc/software/os2/microsoft/ptk10/), March 1988
+
+Note: the above guides are a work-in-progress (we're converting the PDFs to Markdown).
+
+OS/2 Software Development Kit (SDK) Disks
+---
+
+* [Microsoft OS/2 SDK 1.02](/disks/pc/tools/microsoft/os2/sdk/1.02/)