On the left flank you'll find two USB 3.0 ports, headphone and microphone jacks, and
an SDcard reader.
The system has four USB 3.0, one Thunderbolt 3, two DisplayPort - out, two Ethernet jacks,
an SDcard reader, and 5.1 or 7.1 audio with optical audio out (depending on configuration).
There's also
an SDcard reader and the typical headphone and microphone jacks.
There are three USB ports, two of which are 3.0, along with HDMI, Thunderbolt, a combo headphone / microphone jack and
an SDcard reader.