Splitting APIs in tutorial intro

Author: iriark01

docs/introduction/tutorials_intro.md

@@ -28,24 +28,8 @@ These tutorials and examples show you how to perform specific tasks that use the
 | ConditionVariable | [ConditionVariable example](../apis/conditionvariable.html#conditionvariable-example) | |
 | Queue | [Queue example](../apis/queue.html#queue-example) <br> [Queue and MemoryPool](../apis/queue.html#queue-and-memorypool-example)| |
 
+### Using Driver APIs
 
-### Using Input/Output (I/O) APIs
-
-| API | Examples  | Hello, World |
-| --- | ---  | --- |
-| AnalogIn | [AnalogIn example](../apis/analogin.html#analogin-examples) | [AnalogIn Hello, World](../apis/analogin.html#analogin-hello-world)|
-| AnalogOut | [AnalogOut example](../apis/analogout.html#analogout-example) | [AnalogIn Hello, World](../apis/analogout.html#analogout-hello-world) |
-| DigitalIn | [DigitalIn exanple](../apis/digitalin.html#digitalin-example) | [DigitlaIn Hellw, World](../apis/digitalin.html#digitalin-hello-world) |
-| DigitalOut | | [DigitalOut Hello, World](../apis/digitalout.html#digitalout-hello-world) |
-| DigitalInOut | | [DigitalInOut Hello, World](../apis/digitalinout.html#digitalinout-hello-world) |
-| BusIn | | [BusIn Hello, World](../apis/busin.html#busin-hello-world) |
-| BusOut | | [BusOut Hello, World](../apis/busout.html#busout-hello-world) |
-| BusInOut | | [BusInOut Hello, World](../apis/businout.html#businout-hello-world) |
-| PortIn | | [PortIn Hello, World](../apis/portin.html#portin-hello-world) |
-| PortOut | | [PortOut Hello, World](../apis/portout.html#portout-hello-world) |
-| PortInOut | | [PortInOut Hello, World](../apis/portinout.html#portinout-hello-world) |
-| PwmOut | [PwmOut example](../apis/pwmout.html#pwmout-code-examples) | [PwmOut Hello, World](../apis/pwmout.html#pwmout-hello-world) |
-| InterruptIn | [InterruptIn example](../apis/interruptin.html#interruptin-example) | [InterruptIn Hello, World](../apis/interruptin.html#interruptin-hello-world) |
 | Ticker | [Ticker example](../apis/ticker.html#ticker-examples) | [Ticker Hello, World](../apis/ticker.html#ticker-hello-world) |
 | Timeout | [Timeout example](../apis/timeout.html#timeout-example) | [Timeout Hello, World](../apis/timeout.html#timeout-hello-world) |
 | Timer | | [Timer Hello, World](../apis/timer.html#timer-hello-world) |
@@ -63,11 +47,30 @@ These tutorials and examples show you how to perform specific tasks that use the
 | CAN | | [CAN Hello, World](../apis/can.html#can-hello-world) |
 | MbedCRC | [MbedCRC example](../apis/mbedcrc.html#mbedcrc-examples) |
 
+
 And the following tutorials:
 
 - [Application flow control](../tutorials/application-flow-control.html)
 - [Alarm](../tutorials/alarm-tutorial.html)
 
+### Using Input/Output (I/O) APIs
+
+| API | Examples  | Hello, World |
+| --- | ---  | --- |
+| AnalogIn | [AnalogIn example](../apis/analogin.html#analogin-examples) | [AnalogIn Hello, World](../apis/analogin.html#analogin-hello-world)|
+| AnalogOut | [AnalogOut example](../apis/analogout.html#analogout-example) | [AnalogIn Hello, World](../apis/analogout.html#analogout-hello-world) |
+| DigitalIn | [DigitalIn exanple](../apis/digitalin.html#digitalin-example) | [DigitlaIn Hellw, World](../apis/digitalin.html#digitalin-hello-world) |
+| DigitalOut | | [DigitalOut Hello, World](../apis/digitalout.html#digitalout-hello-world) |
+| DigitalInOut | | [DigitalInOut Hello, World](../apis/digitalinout.html#digitalinout-hello-world) |
+| BusIn | | [BusIn Hello, World](../apis/busin.html#busin-hello-world) |
+| BusOut | | [BusOut Hello, World](../apis/busout.html#busout-hello-world) |
+| BusInOut | | [BusInOut Hello, World](../apis/businout.html#businout-hello-world) |
+| PortIn | | [PortIn Hello, World](../apis/portin.html#portin-hello-world) |
+| PortOut | | [PortOut Hello, World](../apis/portout.html#portout-hello-world) |
+| PortInOut | | [PortInOut Hello, World](../apis/portinout.html#portinout-hello-world) |
+| PwmOut | [PwmOut example](../apis/pwmout.html#pwmout-code-examples) | [PwmOut Hello, World](../apis/pwmout.html#pwmout-hello-world) |
+| InterruptIn | [InterruptIn example](../apis/interruptin.html#interruptin-example) | [InterruptIn Hello, World](../apis/interruptin.html#interruptin-hello-world) |
+
 ### Using USB APIs
 
 | API | Examples | Tutorials |