diff --git a/lib/libc/src/malloc.cpp b/lib/libc/src/malloc.cpp
index 5ebbf6e..4747aaf 100644
--- a/lib/libc/src/malloc.cpp
+++ b/lib/libc/src/malloc.cpp
@@ -1,6 +1,5 @@
 #include <zcall.h>
 #include <zglobal.h>
-#include <zinit.h>
 
 #include "stdlib.h"
 
diff --git a/lib/mammoth/include/mammoth/channel.h b/lib/mammoth/include/mammoth/channel.h
index 4fa5d8f..90b1271 100644
--- a/lib/mammoth/include/mammoth/channel.h
+++ b/lib/mammoth/include/mammoth/channel.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <stdint.h>
-#include <zerrors.h>
+#include <ztypes.h>
 
 class Channel {
  public:
diff --git a/lib/mammoth/include/mammoth/debug.h b/lib/mammoth/include/mammoth/debug.h
index 82ecf58..6642eff 100644
--- a/lib/mammoth/include/mammoth/debug.h
+++ b/lib/mammoth/include/mammoth/debug.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <stdint.h>
-#include <zerrors.h>
+#include <ztypes.h>
 
 void dbgln(const char* fmt, ...);
 
diff --git a/lib/mammoth/include/mammoth/init.h b/lib/mammoth/include/mammoth/init.h
index 1e1dbf4..40d1c4a 100644
--- a/lib/mammoth/include/mammoth/init.h
+++ b/lib/mammoth/include/mammoth/init.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <stdint.h>
-#include <zerrors.h>
 #include <zglobal.h>
+#include <ztypes.h>
 
 z_err_t ParseInitPort(uint64_t init_port_cap);
diff --git a/lib/mammoth/include/mammoth/port.h b/lib/mammoth/include/mammoth/port.h
index 57dbf9f..5e174d3 100644
--- a/lib/mammoth/include/mammoth/port.h
+++ b/lib/mammoth/include/mammoth/port.h
@@ -2,7 +2,6 @@
 
 #include <stdint.h>
 #include <zcall.h>
-#include <zerrors.h>
 
 class Port {
  public:
diff --git a/lib/mammoth/src/debug.cpp b/lib/mammoth/src/debug.cpp
index 257b9a9..e5ce355 100644
--- a/lib/mammoth/src/debug.cpp
+++ b/lib/mammoth/src/debug.cpp
@@ -3,7 +3,6 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <zcall.h>
-#include <zerrors.h>
 
 void dbgln_internal(const char* str) {  // Safe to ignore the result since right
                                         // now this doesn't throw.
diff --git a/lib/mammoth/src/init.cpp b/lib/mammoth/src/init.cpp
index 5937bfc..993686a 100644
--- a/lib/mammoth/src/init.cpp
+++ b/lib/mammoth/src/init.cpp
@@ -1,6 +1,6 @@
 #include "mammoth/init.h"
 
-#include <zinit.h>
+#include <ztypes.h>
 
 #include "mammoth/debug.h"
 #include "mammoth/port.h"
diff --git a/lib/mammoth/src/memory_region.cpp b/lib/mammoth/src/memory_region.cpp
index 03e9c2e..9d32718 100644
--- a/lib/mammoth/src/memory_region.cpp
+++ b/lib/mammoth/src/memory_region.cpp
@@ -1,7 +1,6 @@
 #include "mammoth/memory_region.h"
 
 #include <zcall.h>
-#include <zinit.h>
 
 #include "mammoth/debug.h"
 #include "mammoth/init.h"
diff --git a/lib/mammoth/src/process.cpp b/lib/mammoth/src/process.cpp
index 778aca3..46adda8 100644
--- a/lib/mammoth/src/process.cpp
+++ b/lib/mammoth/src/process.cpp
@@ -1,8 +1,6 @@
 #include "mammoth/process.h"
 
 #include <zcall.h>
-#include <zerrors.h>
-#include <zinit.h>
 
 #include "mammoth/channel.h"
 #include "mammoth/debug.h"
diff --git a/lib/mammoth/src/thread.cpp b/lib/mammoth/src/thread.cpp
index cb047ba..4af95ff 100644
--- a/lib/mammoth/src/thread.cpp
+++ b/lib/mammoth/src/thread.cpp
@@ -1,7 +1,6 @@
 #include "mammoth/thread.h"
 
 #include <zcall.h>
-#include <zinit.h>
 
 #include "mammoth/debug.h"
 #include "mammoth/init.h"
diff --git a/sys/denali/ahci/ahci_device.h b/sys/denali/ahci/ahci_device.h
index 16da0aa..957846c 100644
--- a/sys/denali/ahci/ahci_device.h
+++ b/sys/denali/ahci/ahci_device.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <mammoth/memory_region.h>
-#include <zerrors.h>
+#include <ztypes.h>
 
 #include "ahci/ahci.h"
 #include "ahci/command.h"
diff --git a/sys/denali/ahci/ahci_driver.h b/sys/denali/ahci/ahci_driver.h
index d89c510..8c526b0 100644
--- a/sys/denali/ahci/ahci_driver.h
+++ b/sys/denali/ahci/ahci_driver.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <mammoth/thread.h>
-#include <zerrors.h>
+#include <ztypes.h>
 
 #include "ahci/ahci.h"
 #include "ahci/ahci_device.h"
diff --git a/sys/yellowstone/hw/pcie.cpp b/sys/yellowstone/hw/pcie.cpp
index a117987..b3d5d70 100644
--- a/sys/yellowstone/hw/pcie.cpp
+++ b/sys/yellowstone/hw/pcie.cpp
@@ -3,7 +3,6 @@
 #include <mammoth/debug.h>
 #include <mammoth/init.h>
 #include <zcall.h>
-#include <zinit.h>
 
 namespace {
 
diff --git a/sys/yellowstone/yellowstone.cpp b/sys/yellowstone/yellowstone.cpp
index 12ed6db..8fc5cc5 100644
--- a/sys/yellowstone/yellowstone.cpp
+++ b/sys/yellowstone/yellowstone.cpp
@@ -4,7 +4,6 @@
 #include <mammoth/init.h>
 #include <mammoth/process.h>
 #include <zcall.h>
-#include <zinit.h>
 
 #include "hw/pcie.h"
 
diff --git a/zion/boot/acpi.h b/zion/boot/acpi.h
index 60cac00..c151ed0 100644
--- a/zion/boot/acpi.h
+++ b/zion/boot/acpi.h
@@ -2,7 +2,7 @@
 
 #include <stdint.h>
 
-#include "include/zerrors.h"
+#include "include/ztypes.h"
 
 void ProbeRsdp();
 
diff --git a/zion/debug/debug.h b/zion/debug/debug.h
index 45fa5f7..3979d46 100644
--- a/zion/debug/debug.h
+++ b/zion/debug/debug.h
@@ -2,7 +2,7 @@
 
 #include <stdarg.h>
 
-#include "include/zerrors.h"
+#include "include/ztypes.h"
 
 void dbg(const char* fmt, ...);
 void dbgln(const char* str, ...);
diff --git a/zion/include/zcall.h b/zion/include/zcall.h
index 1dc0454..ec0269f 100644
--- a/zion/include/zcall.h
+++ b/zion/include/zcall.h
@@ -2,55 +2,7 @@
 
 #include <stdint.h>
 
-#include "zerrors.h"
-
-#define Z_INVALID 0x0
-
-#define ZC_WRITE 0x01
-#define ZC_READ 0x02
-
-// Process Calls.
-#define Z_PROCESS_EXIT 0x01
-#define Z_PROCESS_SPAWN 0x02
-#define Z_PROCESS_START 0x03
-
-#define ZC_PROC_SPAWN_PROC 0x100
-#define ZC_PROC_SPAWN_THREAD 0x200
-
-// Thread Calls.
-#define Z_THREAD_CREATE 0x10
-#define Z_THREAD_START 0x11
-#define Z_THREAD_EXIT 0x12
-
-// Memory Calls
-#define Z_ADDRESS_SPACE_MAP 0x21
-#define Z_ADDRESS_SPACE_UNMAP 0x22
-
-#define Z_MEMORY_OBJECT_CREATE 0x30
-#define Z_MEMORY_OBJECT_CREATE_PHYSICAL 0x31
-
-#define Z_TEMP_PCIE_CONFIG_OBJECT_CREATE 0x3F
-
-// IPC Calls
-#define Z_CHANNEL_CREATE 0x40
-#define Z_CHANNEL_SEND 0x41
-#define Z_CHANNEL_RECV 0x42
-#define Z_CHANNEL_SENDRECV 0x43
-
-#define Z_PORT_CREATE 0x50
-#define Z_PORT_SEND 0x51
-#define Z_PORT_RECV 0x52
-#define Z_PORT_POLL 0x53
-
-#define Z_IRQ_REGISTER 0x58
-
-#define Z_IRQ_PCI_BASE 0x30
-
-// Capability Calls
-#define Z_CAP_DUPLICATE 0x60
-
-// Debugging Calls.
-#define Z_DEBUG_PRINT 0x10000000
+#include "ztypes.h"
 
 void ZProcessExit(uint64_t code);
 
diff --git a/zion/include/zerrors.h b/zion/include/zerrors.h
deleted file mode 100644
index 5ce35df..0000000
--- a/zion/include/zerrors.h
+++ /dev/null
@@ -1,19 +0,0 @@
-#pragma once
-
-#include <stdint.h>
-
-#define Z_OK 0x0
-#define Z_ERR_NOT_FOUND 0x1
-#define Z_ERR_INVALID 0x2
-#define Z_ERR_DENIED 0x3
-#define Z_ERR_UNIMPLEMENTED 0x4
-#define Z_ERR_BUFF_SIZE 005
-#define Z_ERR_NULL 0x6
-#define Z_ERR_EXISTS 0x7
-#define Z_ERR_EMPTY 0x8
-
-#define Z_ERR_CAP_NOT_FOUND 0x100
-#define Z_ERR_CAP_TYPE 0x101
-#define Z_ERR_CAP_DENIED 0x102
-
-typedef uint64_t z_err_t;
diff --git a/zion/include/zinit.h b/zion/include/zinit.h
index 46acf6e..6f70f09 100644
--- a/zion/include/zinit.h
+++ b/zion/include/zinit.h
@@ -1,8 +1 @@
 #pragma once
-
-#define Z_INIT_SELF_PROC 0x100
-#define Z_INIT_SELF_VMAS 0x101
-
-#define Z_INIT_CHANNEL 0x200
-
-#define Z_BOOT_DENALI_VMMO 0x1000
diff --git a/zion/include/ztypes.h b/zion/include/ztypes.h
new file mode 100644
index 0000000..37caeab
--- /dev/null
+++ b/zion/include/ztypes.h
@@ -0,0 +1,100 @@
+#pragma once
+
+#include <stdint.h>
+
+/* ------------------------------
+ * Error Types
+ *
+ * Bit 31 always set to 1 to
+ * distinguish from user-space errors.
+ * ------------------------------*/
+#define Z_OK 0x0
+
+#define Z_ERR_NOT_FOUND 0x1000'0001
+#define Z_ERR_INVALID 0x1000'0002
+#define Z_ERR_DENIED 0x1000'0003
+#define Z_ERR_UNIMPLEMENTED 0x1000'0004
+#define Z_ERR_BUFF_SIZE 001000'0005
+#define Z_ERR_NULL 0x1000'0006
+#define Z_ERR_EXISTS 0x1000'0007
+#define Z_ERR_EMPTY 0x1000'0008
+
+#define Z_ERR_CAP_NOT_FOUND 0x1001'0000
+#define Z_ERR_CAP_TYPE 0x1001'0001
+#define Z_ERR_CAP_DENIED 0x1001'0002
+
+typedef uint64_t z_err_t;
+
+/* ------------------------------
+ * Syscall Types
+ * ------------------------------*/
+
+// Process Calls.
+#define Z_PROCESS_EXIT 0x01
+#define Z_PROCESS_SPAWN 0x02
+#define Z_PROCESS_START 0x03
+
+// Thread Calls.
+#define Z_THREAD_CREATE 0x10
+#define Z_THREAD_START 0x11
+#define Z_THREAD_EXIT 0x12
+
+// Memory Calls
+#define Z_ADDRESS_SPACE_MAP 0x21
+#define Z_ADDRESS_SPACE_UNMAP 0x22
+
+#define Z_MEMORY_OBJECT_CREATE 0x30
+#define Z_MEMORY_OBJECT_CREATE_PHYSICAL 0x31
+
+#define Z_TEMP_PCIE_CONFIG_OBJECT_CREATE 0x3F
+
+// IPC Calls
+#define Z_CHANNEL_CREATE 0x40
+#define Z_CHANNEL_SEND 0x41
+#define Z_CHANNEL_RECV 0x42
+#define Z_CHANNEL_SENDRECV 0x43
+
+#define Z_PORT_CREATE 0x50
+#define Z_PORT_SEND 0x51
+#define Z_PORT_RECV 0x52
+#define Z_PORT_POLL 0x53
+
+#define Z_IRQ_REGISTER 0x58
+
+#define Z_IRQ_PCI_BASE 0x30
+
+// Capability Calls
+#define Z_CAP_DUPLICATE 0x60
+
+// Debugging Calls.
+#define Z_DEBUG_PRINT 0x10000000
+
+/* ------------------------------
+ * Capability Types
+ * ------------------------------*/
+#define Z_INVALID 0x0
+
+// General Capability Permissions
+#define ZC_WRITE 0x01
+#define ZC_READ 0x02
+
+// Capability Specific Permissions
+#define ZC_PROC_SPAWN_PROC 0x100
+#define ZC_PROC_SPAWN_THREAD 0x200
+
+/* ------------------------------
+ * Process Init Types
+ *
+ * Used to pull capabilites off
+ * the initialization port.
+ *
+ * Start at a high number only to
+ * make them distinctive as a raw
+ * value.
+ * ------------------------------*/
+#define Z_INIT_SELF_PROC 0x4000'0000
+#define Z_INIT_SELF_VMAS 0x4000'0001
+
+#define Z_INIT_CHANNEL 0x4100'0000
+
+#define Z_BOOT_DENALI_VMMO 0x4200'0000
diff --git a/zion/loader/init_loader.cpp b/zion/loader/init_loader.cpp
index 02f7422..4a82123 100644
--- a/zion/loader/init_loader.cpp
+++ b/zion/loader/init_loader.cpp
@@ -3,7 +3,6 @@
 #include "boot/boot_info.h"
 #include "debug/debug.h"
 #include "include/zcall.h"
-#include "include/zinit.h"
 #include "lib/ref_ptr.h"
 #include "memory/paging_util.h"
 #include "object/process.h"
diff --git a/zion/object/channel.cpp b/zion/object/channel.cpp
index 8f19b16..fdaf05c 100644
--- a/zion/object/channel.cpp
+++ b/zion/object/channel.cpp
@@ -1,6 +1,6 @@
 #include "object/channel.h"
 
-#include "include/zerrors.h"
+#include "include/ztypes.h"
 #include "scheduler/scheduler.h"
 
 Pair<RefPtr<Channel>, RefPtr<Channel>> Channel::CreateChannelPair() {
diff --git a/zion/object/channel.h b/zion/object/channel.h
index 28440e5..80d44c2 100644
--- a/zion/object/channel.h
+++ b/zion/object/channel.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include "capability/capability.h"
-#include "include/zerrors.h"
+#include "include/ztypes.h"
 #include "lib/linked_list.h"
 #include "lib/mutex.h"
 #include "lib/pair.h"
diff --git a/zion/object/process.cpp b/zion/object/process.cpp
index 739e11b..b96997b 100644
--- a/zion/object/process.cpp
+++ b/zion/object/process.cpp
@@ -2,7 +2,6 @@
 
 #include "debug/debug.h"
 #include "include/zcall.h"
-#include "include/zinit.h"
 #include "memory/paging_util.h"
 #include "memory/physical_memory.h"
 #include "object/thread.h"
diff --git a/zion/syscall/syscall.cpp b/zion/syscall/syscall.cpp
index f1eb479..a24798a 100644
--- a/zion/syscall/syscall.cpp
+++ b/zion/syscall/syscall.cpp
@@ -6,7 +6,6 @@
 #include "common/msr.h"
 #include "debug/debug.h"
 #include "include/zcall.h"
-#include "include/zerrors.h"
 #include "interrupt/interrupt.h"
 #include "memory/physical_memory.h"
 #include "object/channel.h"