diff --git a/doc/site/modules/index.markdown b/doc/site/modules/index.markdown
index dff56ecc..a84ab5be 100644
--- a/doc/site/modules/index.markdown
+++ b/doc/site/modules/index.markdown
@@ -44,6 +44,6 @@ applications that want to embed Wren.
 [libuv]: http://libuv.org
 
 * [io](io)
-* [process](process)
+* [os](os)
 * [scheduler](scheduler)
 * [timer](timer)
diff --git a/doc/site/modules/os/index.markdown b/doc/site/modules/os/index.markdown
new file mode 100644
index 00000000..0ddc56ca
--- /dev/null
+++ b/doc/site/modules/os/index.markdown
@@ -0,0 +1,7 @@
+^title Module "os"
+
+The os module exposes classes for accessing capabilities provided by the
+underlying operating system.
+
+* [Platform](platform.html)
+* [Process](process.html)
diff --git a/doc/site/modules/os/platform.markdown b/doc/site/modules/os/platform.markdown
new file mode 100644
index 00000000..f4b62b5e
--- /dev/null
+++ b/doc/site/modules/os/platform.markdown
@@ -0,0 +1,26 @@
+^title Platform Class
+
+The Platform class exposes basic information about the operating system Wren is
+running on top of.
+
+## Static Methods
+
+### **name**
+
+The name of the platform. This roughly describes the operating system, and is
+usually one of:
+
+* "iOS"
+* "Linux"
+* "OS X"
+* "POSIX"
+* "Unix"
+* "Windows"
+
+If Wren was compiled for an unknown operating system, returns "Unknown".
+
+### **isPosix**
+
+Returns `true` if the host operating system is known to support the POSIX
+standard. This is true for Linux and other Unices, as well as the various Apple
+operating systems.
diff --git a/doc/site/modules/process/process.markdown b/doc/site/modules/os/process.markdown
similarity index 90%
rename from doc/site/modules/process/process.markdown
rename to doc/site/modules/os/process.markdown
index ff3787ea..8589572b 100644
--- a/doc/site/modules/process/process.markdown
+++ b/doc/site/modules/os/process.markdown
@@ -1,6 +1,6 @@
 ^title Process Class
 
-The Process class lets you work with operating processes, including the
+The Process class lets you work with operating system processes, including the
 currently running one.
 
 ## Static Methods
diff --git a/doc/site/modules/process/template.html b/doc/site/modules/os/template.html
similarity index 87%
rename from doc/site/modules/process/template.html
rename to doc/site/modules/os/template.html
index 5d26689b..b8a2f191 100644
--- a/doc/site/modules/process/template.html
+++ b/doc/site/modules/os/template.html
@@ -22,11 +22,12 @@
   <nav class="big">
     <ul>
       <li><a href="../">Modules</a></li>
-      <li><a href="./">process</a></li>
+      <li><a href="./">os</a></li>
     </ul>
     <section>
-      <h2>process classes</h2>
+      <h2>os classes</h2>
       <ul>
+        <li><a href="platform.html">Platform</a></li>
         <li><a href="process.html">Process</a></li>
       </ul>
     </section>
@@ -35,14 +36,15 @@
     <table>
       <tr>
         <td><a href="../">Modules</a></td>
-        <td><a href="./">process</a></td>
+        <td><a href="./">os</a></td>
       </tr>
       <tr>
-        <td colspan="2"><h2>process classes</h2></td>
+        <td colspan="2"><h2>os classes</h2></td>
       </tr>
       <tr>
         <td>
           <ul>
+            <li><a href="platform.html">Platform</a></li>
             <li><a href="process.html">Process</a></li>
           </ul>
         </td>
diff --git a/doc/site/modules/process/index.markdown b/doc/site/modules/process/index.markdown
deleted file mode 100644
index 4475cf42..00000000
--- a/doc/site/modules/process/index.markdown
+++ /dev/null
@@ -1,5 +0,0 @@
-^title Module "process"
-
-The process module exposes a single class for working with operating processes.
-
-* [Process](process.html)
diff --git a/doc/site/modules/template.html b/doc/site/modules/template.html
index 7dd9550e..69718423 100644
--- a/doc/site/modules/template.html
+++ b/doc/site/modules/template.html
@@ -37,7 +37,7 @@
       <h2>cli</h2>
       <ul>
         <li><a href="io">io</a></li>
-        <li><a href="process">process</a></li>
+        <li><a href="os">os</a></li>
         <li><a href="scheduler">scheduler</a></li>
         <li><a href="timer">timer</a></li>
       </ul>
@@ -65,7 +65,7 @@
         <td>
           <ul>
             <li><a href="io">io</a></li>
-            <li><a href="process">process</a></li>
+            <li><a href="os">os</a></li>
             <li><a href="scheduler">scheduler</a></li>
             <li><a href="timer">timer</a></li>
           </ul>
diff --git a/src/cli/main.c b/src/cli/main.c
index 8e280179..f8af4b32 100644
--- a/src/cli/main.c
+++ b/src/cli/main.c
@@ -1,7 +1,7 @@
 #include <stdio.h>
 #include <string.h>
 
-#include "process.h"
+#include "os.h"
 #include "vm.h"
 #include "wren.h"
 
@@ -14,7 +14,7 @@ int main(int argc, const char* argv[])
     return 0;
   }
   
-  processSetArguments(argc, argv);
+  osSetArguments(argc, argv);
 
   if (argc == 1)
   {
diff --git a/src/cli/modules.c b/src/cli/modules.c
index ed1df04c..cd90850a 100644
--- a/src/cli/modules.c
+++ b/src/cli/modules.c
@@ -4,7 +4,7 @@
 #include "modules.h"
 
 #include "io.wren.inc"
-#include "process.wren.inc"
+#include "os.wren.inc"
 #include "scheduler.wren.inc"
 #include "timer.wren.inc"
 
@@ -21,6 +21,8 @@ extern void fileRealPath(WrenVM* vm);
 extern void fileSize(WrenVM* vm);
 extern void fileStat(WrenVM* vm);
 extern void fileWriteBytes(WrenVM* vm);
+extern void platformIsPosix(WrenVM* vm);
+extern void platformName(WrenVM* vm);
 extern void processAllArguments(WrenVM* vm);
 extern void statPath(WrenVM* vm);
 extern void statBlockCount(WrenVM* vm);
@@ -149,7 +151,11 @@ static ModuleRegistry modules[] =
       STATIC_METHOD("readStop_()", stdinReadStop)
     END_CLASS
   END_MODULE
-  MODULE(process)
+  MODULE(os)
+    CLASS(Platform)
+      STATIC_METHOD("isPosix", platformIsPosix)
+      STATIC_METHOD("name", platformName)
+    END_CLASS
     CLASS(Process)
       STATIC_METHOD("allArguments", processAllArguments)
     END_CLASS
diff --git a/src/module/os.c b/src/module/os.c
new file mode 100644
index 00000000..5ba07c0c
--- /dev/null
+++ b/src/module/os.c
@@ -0,0 +1,71 @@
+#include "os.h"
+#include "wren.h"
+
+#if __APPLE__
+  #include "TargetConditionals.h"
+#endif
+
+int numArgs;
+const char** args;
+
+void osSetArguments(int argc, const char* argv[])
+{
+  numArgs = argc;
+  args = argv;
+}
+
+void platformName(WrenVM* vm)
+{
+  wrenEnsureSlots(vm, 1);
+  
+  #ifdef _WIN32
+    wrenSetSlotString(vm, 0, "Windows");
+  #elif __APPLE__
+    #if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
+      wrenSetSlotString(vm, 0, "iOS");
+    #elif TARGET_OS_MAC
+      wrenSetSlotString(vm, 0, "OS X");
+    #else
+      wrenSetSlotString(vm, 0, "Unknown");
+    #endif
+  #elif __linux__
+    wrenSetSlotString(vm, 0, "Linux");
+  #elif __unix__
+    wrenSetSlotString(vm, 0, "Unix");
+  #elif defined(_POSIX_VERSION)
+    wrenSetSlotString(vm, 0, "POSIX");
+  #else
+    wrenSetSlotString(vm, 0, "Unknown");
+  #endif
+}
+
+void platformIsPosix(WrenVM* vm)
+{
+  wrenEnsureSlots(vm, 1);
+  
+  #ifdef _WIN32
+    wrenSetSlotBool(vm, 0, false);
+  #elif __APPLE__
+    wrenSetSlotBool(vm, 0, true);
+  #elif __linux__
+    wrenSetSlotBool(vm, 0, true);
+  #elif __unix__
+    wrenSetSlotBool(vm, 0, true);
+  #elif defined(_POSIX_VERSION)
+    wrenSetSlotBool(vm, 0, true);
+  #else
+    wrenSetSlotString(vm, 0, false);
+  #endif
+}
+
+void processAllArguments(WrenVM* vm)
+{
+  wrenEnsureSlots(vm, 2);
+  wrenSetSlotNewList(vm, 0);
+
+  for (int i = 0; i < numArgs; i++)
+  {
+    wrenSetSlotString(vm, 1, args[i]);
+    wrenInsertInList(vm, 0, -1, 1);
+  }
+}
\ No newline at end of file
diff --git a/src/module/process.h b/src/module/os.h
similarity index 68%
rename from src/module/process.h
rename to src/module/os.h
index 3b01f702..25dd9742 100644
--- a/src/module/process.h
+++ b/src/module/os.h
@@ -4,6 +4,6 @@
 #include "wren.h"
 
 // Stores the command line arguments passed to the CLI.
-void processSetArguments(int argc, const char* argv[]);
+void osSetArguments(int argc, const char* argv[]);
 
 #endif
diff --git a/src/module/process.wren b/src/module/os.wren
similarity index 70%
rename from src/module/process.wren
rename to src/module/os.wren
index 9f6b4fe9..4e73f066 100644
--- a/src/module/process.wren
+++ b/src/module/os.wren
@@ -1,3 +1,8 @@
+class Platform {
+  foreign static isPosix
+  foreign static name
+}
+
 class Process {
   // TODO: This will need to be smarter when wren supports CLI options.
   static arguments { allArguments[2..-1] }
diff --git a/src/module/os.wren.inc b/src/module/os.wren.inc
new file mode 100644
index 00000000..96cc3bf6
--- /dev/null
+++ b/src/module/os.wren.inc
@@ -0,0 +1,13 @@
+// Generated automatically from src/module/os.wren. Do not edit.
+static const char* osModuleSource =
+"class Platform {\n"
+"  foreign static isPosix\n"
+"  foreign static name\n"
+"}\n"
+"\n"
+"class Process {\n"
+"  // TODO: This will need to be smarter when wren supports CLI options.\n"
+"  static arguments { allArguments[2..-1] }\n"
+"\n"
+"  foreign static allArguments\n"
+"}\n";
diff --git a/src/module/process.c b/src/module/process.c
deleted file mode 100644
index 435e22a0..00000000
--- a/src/module/process.c
+++ /dev/null
@@ -1,23 +0,0 @@
-#include "process.h"
-#include "wren.h"
-
-int numArgs;
-const char** args;
-
-void processSetArguments(int argc, const char* argv[])
-{
-  numArgs = argc;
-  args = argv;
-}
-
-void processAllArguments(WrenVM* vm)
-{
-  wrenEnsureSlots(vm, 2);
-  wrenSetSlotNewList(vm, 0);
-
-  for (int i = 0; i < numArgs; i++)
-  {
-    wrenSetSlotString(vm, 1, args[i]);
-    wrenInsertInList(vm, 0, -1, 1);
-  }
-}
\ No newline at end of file
diff --git a/src/module/process.wren.inc b/src/module/process.wren.inc
deleted file mode 100644
index 87ef4e88..00000000
--- a/src/module/process.wren.inc
+++ /dev/null
@@ -1,7 +0,0 @@
-// Generated automatically from src/module/process.wren. Do not edit.
-static const char* processModuleSource =
-"class Process {\n"
-"  static arguments { allArguments[2..-1] }\n"
-"\n"
-"  foreign static allArguments\n"
-"}\n";
diff --git a/test/os/platform/is_posix.wren b/test/os/platform/is_posix.wren
new file mode 100644
index 00000000..18362c03
--- /dev/null
+++ b/test/os/platform/is_posix.wren
@@ -0,0 +1,5 @@
+import "os" for Platform
+
+// Can't test for certain values since this test is cross-platform, but we can
+// at least make sure it is callable and returns a bool.
+System.print(Platform.isPosix is Bool) // expect: true
diff --git a/test/os/platform/name.wren b/test/os/platform/name.wren
new file mode 100644
index 00000000..bfee05e3
--- /dev/null
+++ b/test/os/platform/name.wren
@@ -0,0 +1,5 @@
+import "os" for Platform
+
+// Can't test for certain values since this test is cross-platform, but we can
+// at least make sure it is callable and returns a string.
+System.print(Platform.name is String) // expect: true
diff --git a/test/process/all_arguments.wren b/test/os/process/all_arguments.wren
similarity index 76%
rename from test/process/all_arguments.wren
rename to test/os/process/all_arguments.wren
index 28bc744d..efb55aca 100644
--- a/test/process/all_arguments.wren
+++ b/test/os/process/all_arguments.wren
@@ -1,4 +1,4 @@
-import "process" for Process
+import "os" for Process
 
 var args = Process.allArguments
 System.print(args is List) // expect: true
@@ -6,6 +6,6 @@ System.print(args.count)   // expect: 2
 
 // Includes wren executable and file being run.
 System.print(args[0].endsWith("wrend")) // expect: true
-System.print(args[1]) // expect: test/process/all_arguments.wren
+System.print(args[1]) // expect: test/os/process/all_arguments.wren
 
 // TODO: Test passing additional args once we have an API to spawn a process.
diff --git a/test/process/arguments.wren b/test/os/process/arguments.wren
similarity index 85%
rename from test/process/arguments.wren
rename to test/os/process/arguments.wren
index 9edb5178..b396f084 100644
--- a/test/process/arguments.wren
+++ b/test/os/process/arguments.wren
@@ -1,4 +1,4 @@
-import "process" for Process
+import "os" for Process
 
 // No additional arguments are passed to the test.
 System.print(Process.arguments) // expect: []
diff --git a/util/xcode/wren.xcodeproj/project.pbxproj b/util/xcode/wren.xcodeproj/project.pbxproj
index 4b183dcc..a6188726 100644
--- a/util/xcode/wren.xcodeproj/project.pbxproj
+++ b/util/xcode/wren.xcodeproj/project.pbxproj
@@ -38,10 +38,10 @@
 		29A4273B1BDBE435001E6E22 /* wren_opt_random.wren.inc in Sources */ = {isa = PBXBuildFile; fileRef = 29A427331BDBE435001E6E22 /* wren_opt_random.wren.inc */; };
 		29C8A9331AB71FFF00DEC81D /* vm.c in Sources */ = {isa = PBXBuildFile; fileRef = 29C8A9311AB71FFF00DEC81D /* vm.c */; };
 		29C946981C88F14F00B4A4F3 /* new_vm.c in Sources */ = {isa = PBXBuildFile; fileRef = 29C946961C88F14F00B4A4F3 /* new_vm.c */; };
-		29D025E31C19CD1000A3BB28 /* process.c in Sources */ = {isa = PBXBuildFile; fileRef = 29D025E01C19CD1000A3BB28 /* process.c */; };
-		29D025E41C19CD1000A3BB28 /* process.c in Sources */ = {isa = PBXBuildFile; fileRef = 29D025E01C19CD1000A3BB28 /* process.c */; };
-		29D025E51C19CD1000A3BB28 /* process.wren.inc in Sources */ = {isa = PBXBuildFile; fileRef = 29D025E21C19CD1000A3BB28 /* process.wren.inc */; };
-		29D025E61C19CD1000A3BB28 /* process.wren.inc in Sources */ = {isa = PBXBuildFile; fileRef = 29D025E21C19CD1000A3BB28 /* process.wren.inc */; };
+		29D025E31C19CD1000A3BB28 /* os.c in Sources */ = {isa = PBXBuildFile; fileRef = 29D025E01C19CD1000A3BB28 /* os.c */; };
+		29D025E41C19CD1000A3BB28 /* os.c in Sources */ = {isa = PBXBuildFile; fileRef = 29D025E01C19CD1000A3BB28 /* os.c */; };
+		29D025E51C19CD1000A3BB28 /* os.wren.inc in Sources */ = {isa = PBXBuildFile; fileRef = 29D025E21C19CD1000A3BB28 /* os.wren.inc */; };
+		29D025E61C19CD1000A3BB28 /* os.wren.inc in Sources */ = {isa = PBXBuildFile; fileRef = 29D025E21C19CD1000A3BB28 /* os.wren.inc */; };
 		29DC149F1BBA2FCC008A8274 /* vm.c in Sources */ = {isa = PBXBuildFile; fileRef = 29C8A9311AB71FFF00DEC81D /* vm.c */; };
 		29DC14A01BBA2FD6008A8274 /* timer.c in Sources */ = {isa = PBXBuildFile; fileRef = 2901D7621B74F4050083A2C8 /* timer.c */; };
 		29DC14A11BBA2FEC008A8274 /* scheduler.c in Sources */ = {isa = PBXBuildFile; fileRef = 291647C21BA5EA45006142EE /* scheduler.c */; };
@@ -135,9 +135,9 @@
 		29D009AB1B7E39A8000CE58C /* slots.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = slots.h; path = ../../test/api/slots.h; sourceTree = "<group>"; };
 		29D009AC1B7E39A8000CE58C /* handle.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = handle.c; path = ../../test/api/handle.c; sourceTree = "<group>"; };
 		29D009AD1B7E39A8000CE58C /* handle.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = handle.h; path = ../../test/api/handle.h; sourceTree = "<group>"; };
-		29D025E01C19CD1000A3BB28 /* process.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = process.c; path = ../../src/module/process.c; sourceTree = "<group>"; };
-		29D025E11C19CD1000A3BB28 /* process.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = process.h; path = ../../src/module/process.h; sourceTree = "<group>"; };
-		29D025E21C19CD1000A3BB28 /* process.wren.inc */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.pascal; name = process.wren.inc; path = ../../src/module/process.wren.inc; sourceTree = "<group>"; };
+		29D025E01C19CD1000A3BB28 /* os.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = os.c; path = ../../src/module/os.c; sourceTree = "<group>"; };
+		29D025E11C19CD1000A3BB28 /* os.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = os.h; path = ../../src/module/os.h; sourceTree = "<group>"; };
+		29D025E21C19CD1000A3BB28 /* os.wren.inc */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.pascal; name = os.wren.inc; path = ../../src/module/os.wren.inc; sourceTree = "<group>"; };
 		29F384111BD19706002F84E0 /* io.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = io.h; path = ../../src/module/io.h; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -167,9 +167,9 @@
 				29F384111BD19706002F84E0 /* io.h */,
 				29729F2E1BA70A620099CA20 /* io.c */,
 				29729F301BA70A620099CA20 /* io.wren.inc */,
-				29D025E11C19CD1000A3BB28 /* process.h */,
-				29D025E01C19CD1000A3BB28 /* process.c */,
-				29D025E21C19CD1000A3BB28 /* process.wren.inc */,
+				29D025E11C19CD1000A3BB28 /* os.h */,
+				29D025E01C19CD1000A3BB28 /* os.c */,
+				29D025E21C19CD1000A3BB28 /* os.wren.inc */,
 				291647C31BA5EA45006142EE /* scheduler.h */,
 				291647C21BA5EA45006142EE /* scheduler.c */,
 				291647CD1BA5ED26006142EE /* scheduler.wren.inc */,
@@ -369,8 +369,8 @@
 				29A427341BDBE435001E6E22 /* wren_opt_meta.c in Sources */,
 				29205C9B1AB4E6430073018D /* wren_debug.c in Sources */,
 				29205C9D1AB4E6430073018D /* wren_utils.c in Sources */,
-				29D025E51C19CD1000A3BB28 /* process.wren.inc in Sources */,
-				29D025E31C19CD1000A3BB28 /* process.c in Sources */,
+				29D025E51C19CD1000A3BB28 /* os.wren.inc in Sources */,
+				29D025E31C19CD1000A3BB28 /* os.c in Sources */,
 				29729F311BA70A620099CA20 /* io.c in Sources */,
 				29A427361BDBE435001E6E22 /* wren_opt_meta.wren.inc in Sources */,
 				29205C9E1AB4E6430073018D /* wren_value.c in Sources */,
@@ -384,7 +384,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				29A427371BDBE435001E6E22 /* wren_opt_meta.wren.inc in Sources */,
-				29D025E41C19CD1000A3BB28 /* process.c in Sources */,
+				29D025E41C19CD1000A3BB28 /* os.c in Sources */,
 				29729F321BA70A620099CA20 /* io.c in Sources */,
 				29932D541C210F8D00099DEE /* lists.c in Sources */,
 				291647C81BA5EC5E006142EE /* modules.c in Sources */,
@@ -402,7 +402,7 @@
 				29DC14A71BBA301A008A8274 /* wren_utils.c in Sources */,
 				29DC14A81BBA301D008A8274 /* wren_value.c in Sources */,
 				29A4273B1BDBE435001E6E22 /* wren_opt_random.wren.inc in Sources */,
-				29D025E61C19CD1000A3BB28 /* process.wren.inc in Sources */,
+				29D025E61C19CD1000A3BB28 /* os.wren.inc in Sources */,
 				29DC14A91BBA302F008A8274 /* wren_vm.c in Sources */,
 				29DC14AA1BBA3032008A8274 /* main.c in Sources */,
 				293D46961BB43F9900200083 /* call.c in Sources */,