The science instruments of BepiColombo’s Mercury Planetary Orbiter. There are 11 instrument suites in total, several of which have multiple subsystems (as indicated in the graphic).
BELA: BepiColombo laser altimeter
ISA: Italian spring accelerometer
MPO-MAG: Mercury Planetary Orbiter Magnetometer
MERTIS: MErcury Radiometer and Thermal Infrared Spectrometer
MGNS: Mercury Gamma-ray and Neutron Spectrometer
MIXS: Mercury Imaging X-ray Spectrometer (-C: collimator; -T: telescope)
MORE: Mercury Orbiter Radio-science Experiment
PHEBUS: Probing of Hermean Exosphere by Ultraviolet Spectroscopy
SERENA: Search for Exospheric Refilling and Emitted Natural Abundance (ELENA: Emitted Low-Energy Neutral Atoms; MIPA: Miniature Ion Precipitation Analyser; PICAM: Planetary Ion Camera; STROFIO: Start from a Rotating Field Mass Spectrometer)
SIMBIO-SYS: Spectrometer and Imagers for MPO BepiColombo Integrated Observatory System
SIXS: Solar Intensity X-ray and particle Spectrometer
Note that MPO-MAG, PHEBUS and SIXS are not visible in this view; see this image for details.