diff --git a/pubs/pc/software/README.md b/pubs/pc/software/README.md
index e62839788..560d73726 100644
--- a/pubs/pc/software/README.md
+++ b/pubs/pc/software/README.md
@@ -15,5 +15,11 @@ PC Software Development Guides
 
 * [OS/2 Software Development Guides](os2/)
 
+PC Software Development Tools
+---
+
+* [Microsoft Macro Assembler 5.0](tools/microsoft/masm/5.00/)
+* [Microsoft C Optimizing Compiler 5.1](tools/microsoft/c/5.10/)
+
 [<img src="http://archive.pcjs.org/pubs/pc/software/dos/PCDOS100/thumbs/PCDOS100.jpg" width="200" height="260" alt="IBM PC Disk Operating System v1.00"/>](dos/PCDOS100/)
 [<img src="http://archive.pcjs.org/pubs/pc/software/dos/PCDOS110/thumbs/PCDOS110.jpg" width="200" height="260" alt="IBM PC Disk Operating System v1.10"/>](dos/PCDOS110/)
diff --git a/pubs/pc/software/tools/microsoft/c/5.10/README.md b/pubs/pc/software/tools/microsoft/c/5.10/README.md
new file mode 100644
index 000000000..a40028c5f
--- /dev/null
+++ b/pubs/pc/software/tools/microsoft/c/5.10/README.md
@@ -0,0 +1,12 @@
+---
+layout: page
+title: Microsoft C Optimizing Compiler 5.1
+permalink: /pubs/pc/software/tools/microsoft/c/5.10/
+---
+
+Microsoft C Optimizing Compiler 5.1 (Update)
+---
+
+* [MSC 5.1 Update](http://archive.pcjs.org/pubs/pc/software/tools/microsoft/c/5.10/MSC51-UPDATE.pdf)
+* [MSC 5.1 Editor User's Guide](http://archive.pcjs.org/pubs/pc/software/tools/microsoft/c/5.10/MSC51-EDITOR.pdf)
+* [MSC 5.1 CodeView and Utilities Update](http://archive.pcjs.org/pubs/pc/software/tools/microsoft/c/5.10/MSC51-UTILITIES.pdf)
diff --git a/pubs/pc/software/tools/microsoft/masm/5.00/README.md b/pubs/pc/software/tools/microsoft/masm/5.00/README.md
new file mode 100644
index 000000000..1ab2e65a6
--- /dev/null
+++ b/pubs/pc/software/tools/microsoft/masm/5.00/README.md
@@ -0,0 +1,20 @@
+---
+layout: page
+title: Microsoft Macro Assembler 5.0
+permalink: /pubs/pc/software/tools/microsoft/masm/5.00/
+---
+
+Microsoft Macro Assembler 5.0 Manuals
+---
+
+* [MASM 5.0 Reference](http://archive.pcjs.org/pubs/pc/software/tools/microsoft/masm/5.00/MASM50-POCKETREF.pdf)
+* [MASM 5.0 Programming Guide](http://archive.pcjs.org/pubs/pc/software/tools/microsoft/masm/5.00/MASM50-PROGGUIDE.pdf)
+* [MASM 5.0 CodeView and Utilities Guide](http://archive.pcjs.org/pubs/pc/software/tools/microsoft/masm/5.00/MASM50-UTILGUIDE.pdf)
+
+Microsoft Macro Assembler 5.x Ephemera
+---
+
+* [MASM 5.0 Box](http://archive.pcjs.org/pubs/pc/software/tools/microsoft/masm/5.00/MASM50-BOX.pdf)
+* [MASM 5.0 Brochure](http://archive.pcjs.org/pubs/pc/software/tools/microsoft/masm/5.00/MASM50-BROCHURE.pdf)
+* [MASM 5.0 READ THIS FIRST](http://archive.pcjs.org/pubs/pc/software/tools/microsoft/masm/5.00/MASM50-READTHISFIRST.pdf)
+* [MASM 5.1 Letters](http://archive.pcjs.org/pubs/pc/software/tools/microsoft/masm/5.00/MASM51-LETTERS.pdf)