This class includes:
- manufacture of manual or electric typewriters
- manufacture of word-processing machines
- manufacture of hectograph or stencil duplicating machines, addressing machines and sheet fed office type offset printing machines
- manufacture of calculating machines, cash registers, postage franking machines, special terminals for issuing of tickets and reservations, etc.
- manufacture of diverse office machinery or equipment:
. machines that sort, wrap or count coins; automatic banknote dispensers; machines that stuff envelopes, sort mail; pencil sharpening machines; perforating or stapling machines, etc.

This class includes:
- manufacture of automatic data processing machines including micro-computers:
. digital machines
. analogue machines
. hybrid machines
- manufacture of peripheral units:
. printers, terminals, etc.
. magnetic or optical readers
. machines for transcribing data onto data media in coded form

This class excludes:
- manufacture of electronic parts found in computing machinery cf. 32.10
- manufacture of electronic games cf. 36.50
- repair and maintenance of computer systems cf. 72.50

This class includes:
- manufacture of AC motors
- manufacture of AC generators
- manufacture of universal AC/DC motors
- manufacture of DC motors or generators
- manufacture of AC or DC generator sets
- manufacture of electric rotary or static converters
- manufacture of electrical transformers

This class excludes:
- manufacture of vehicle generators and cranking motors cf. 31.61
- manufacture of diode valves cf. 32.10

This class includes:
- manufacture of electrical apparatus for switching or protecting electrical circuits, or for making connections to or in electrical circuits: manufacture of switches, fuses, lightning arresters, voltage limiters, surge suppressors, plugs, junction boxes, relays, sockets, lamp holders
- manufacture of electric control or distribution boards, panels, consoles, desks, cabinets and other bases

This class excludes:
- manufacture of fuse wire or strip cf. 27.4
- manufacture of carbon or graphite electrodes cf. 31.62
- manufacture of boards, panels, consoles, etc. for use in line telephony or line telegraphy cf. 32.20/1

This class excludes:
- manufacture of uninsulated non-ferrous metal wire cf. 27.4
- manufacture of uninsulated metal cable or insulated cable not capable of being used as a conductor of electricity cf. 28.73
- manufacture of wiring sets cf. 31.61
- manufacture of optical fibres and optical fibre cables for live transmission of images: endoscopy, lighting, live images cf. 33.40/1

This class includes:
- manufacture of primary cells and primary batteries
- manufacture of electric accumulators, including parts thereof

This class includes:
- manufacture of electric filament or discharge lamps:
. ultra-violet or infra-red lamps
. arc lamps
. flashbulbs, flashcubes, etc.
- manufacture of electric lamps and lighting fittings:
. chandeliers, table, desk, bedside or floor-standing lamps, even non-electric
. portable electric lamps
. illuminated signs and name-plates, etc.
. outdoor and road lighting
. lighting sets of a kind used for Christmas trees

This class includes:
- manufacture of electrical ignition or starting equipment for internal combustion engines: ignition magnetos, magneto-dynamos, ignition coils, sparking plugs, glow plugs, starter motors, generators (dynamos, alternators), voltage regulators, etc.
- manufacture of electrical lighting and sound or visual signalling equipment for cycles and motor vehicles: lamps, horns, sirens, etc.
- manufacture of wiring sets
- manufacture of windscreen wipers and electrical defrosters and demisters
- manufacture of dynamos for cycles

This class includes:
- manufacture of electrical signalling, safety or traffic control equipment for motorways, roads or streets, railways and tramways, inland waterways, ports and harbours and airports
- manufacture of diverse electrical sound or visual signalling apparatus:
. bells, sirens, indicator panels, burglar and fire alarms, etc.
- manufacture of electromagnets including electromagnetic or permanent magnet chucks, clutches, brakes, couplings, clamps or lifting heads
- manufacture of electrical insulators and insulating fittings, except of glass or ceramics
- manufacture of insulating fittings for electrical machines or equipment, except of ceramics or plastics
- manufacture of carbon or graphite electrodes
- manufacture of electrical conduit tubing and joints for such tubing, of base metal lined with insulating material
- manufacture of diverse electrical machines and apparatus: manufacture of particle accelerators, signal generators, mine detectors, electrical detonators, etc.

This class excludes:
- manufacture of glass envelopes for lamps cf. 26.15
- manufacture of hand-held electrically operated spray guns cf. 29.24
- manufacture of electric lawn mowers cf. 29.32
- manufacture of electric shavers cf. 29.71
- manufacture of electronic valves and tubes (including cold cathode valves) cf. 32.10
- manufacture of electrically operated hand-held medical or dental instruments cf. 33.10

This class includes:
- manufacture of thermionic, cold cathode or photo-cathode valves or tubes:
. television picture tubes, television camera tubes, image converters and intensifiers, microwave tubes, receiver or amplifier valves or tubes, etc.
- manufacture of diodes, transistors and similar semi-conductor devices
- manufacture of photosensitive semi-conductor devices including photo-voltaic cells
- manufacture of mounted piezo-electric crystals
- manufacture of electronic integrated circuits and micro-assemblies:
. monolithic integrated circuits, hybrid integrated circuits and electronic micro-assemblies of moulded module, micro module or similar types
- manufacture of printed circuits
- manufacture of electrical capacitors (or condensers), including power capacitors
- manufacture of resistors including rheostats and potentiometers

This class excludes:
- manufacture of heating resistors cf. 29.71
- manufacture of transformers cf. 31.10
- manufacture of switches cf. 31.20

This subclass includes:
- manufacture of apparatus for line telephony:
. telephone sets, fax machines, automatic and non-automatic switchboards and exchanges, telex and teleprinter apparatus

This subclass excludes:
- manufacture of electronic components cf. 32.10

This subclass includes:
- manufacture of apparatus for television transmission including manufacture of relay transmitters and television transmitters for industrial use
- manufacture of television cameras
- manufacture of transmission apparatus for radio-broadcasting
- manufacture of transmission apparatus for radio-telephony:
. fixed transmitters and transmitter-receivers, radio-telephony apparatus for transport equipment, radio-telephones, other transponders, etc.
- manufacture of reception apparatus for radio-telephony

This subclass excludes:
- manufacture of electronic components cf. 32.10
- manufacture of radar apparatus, radio remote control apparatus and radio navigational aid apparatus cf. 33.20/1

This class includes:
- manufacture of television receivers including video monitors and video projectors
- manufacture of video recording or reproducing apparatus including camcorders
- manufacture of radio-broadcasting receivers
- manufacture of magnetic tape recorders and other sound recording apparatus including telephone answering machines, cassette-type recorders, etc.
- manufacture of turn-tables (record decks), record players, cassette players, CD players, etc.
- manufacture of microphones, loudspeakers, headphones, earphones, amplifiers and sound amplifier sets
- manufacture of pick-ups, tone arms, sound-heads, tables for turn-tables, record cutters, aerials, aerial reflectors and aerial rotors, cable converters, TV decoders

This class also includes:
- manufacture of sound electro acoustic apparatus including door intercoms, command transmitter intercoms, simultaneous interpretation apparatus, electronic voting systems, conference systems, paging devices, portable sound systems
- manufacture of furniture specially designed as parts of radios, tv-sets, loudspeakers, etc.

This class excludes:
- publishing and reproduction of pre-recorded audio and video discs and tapes cf. 22.1, 22.3
- manufacture of prepared unrecorded media cf. 24.65

This class includes:
- manufacture of instruments and appliances used for medical, surgical, dental or veterinary purposes:
. electro-diagnostic apparatus such as electrocardiographs, ultrasonic diagnostic equipment, scintillation scanners, nuclear magnetic resonance apparatus, dental drill engines, sterilizers, ophthalmic instruments
- manufacture of syringes, needles used in medicine, mirrors, reflectors, endoscopes, etc.
- manufacture of apparatus based on the use of X-rays or alpha, beta or gamma radiation whether or not for use in human or animal medicine:
. X-ray tubes, high tension generators, control panels, desks, screens, etc.
- manufacture of medical, surgical, dental or veterinary furniture:
. operating tables, hospital beds with mechanical fittings, dentists' chairs
- manufacture of mechano-therapy appliances, massage apparatus, psychological testing apparatus, ozone therapy, oxygen therapy, artificial respiration apparatus, gas masks, etc.
- manufacture of orthopaedic appliances:
. crutches, surgical belts and trusses, splints, artificial teeth, artificial limbs and other artificial parts of the body, hearing aids, pace-makers, etc.

This class excludes:
- manufacture of cement used in dentistry cf. 24.42/2
- manufacture of thermometers cf. 33.20
- manufacture of corrective spectacle lenses and of their frames cf. 33.40/1, or of optical microscopes cf. 33.40/2

This subclass includes:
- manufacture of laboratory type sensitive balances
- manufacture of apparatus for measuring and checking electrical quantities: oscilloscopes, spectrum analysers, cross-talk meters, instruments for checking current, voltage, resistance, etc.
- manufacture of navigational, meteorological, geophysical and related instruments and apparatus:
. surveying instruments, oceanographic or hydrological instruments, seismometers, range-finders, automatic pilots, sextants, ultrasonic sounding instruments, air navigation instruments and systems
- manufacture of radar apparatus, radio remote control apparatus and radio navigational aid apparatus
- manufacture of electricity supply meters and supply meters for water, gas, petrol, etc.
- manufacture of machines and appliances for testing the mechanical properties of materials
- manufacture of instruments and apparatus for carrying out physical or chemical analyses:
. polarimeters, photometers, refractometers, colorimeters, spectrometers, pH-meters, viscometers, surface tension instruments, etc.
- manufacture of instruments and apparatus for measuring or checking the flow, level, pressure or other variables of liquids or gases:
. flow meters, level gauges, manometers, heat meters, etc.
- manufacture of diverse measuring, checking or testing instruments, apparatus or machines:
. hydrometers, thermometers, barometers, revolution counters, taximeters, pedometers, tachometers, balancing machines, test benches, comparators, etc.

This subclass also includes:
- manufacture of optical type measuring and checking appliances and instruments

This subclass excludes:
- manufacture of pumps incorporating measuring devices cf. 29.12/1
- manufacture of medical and surgical instruments cf. 33.10
- manufacture of industrial process control equipment cf. 33.30
- manufacture of optical microscopes cf. 33.40/2

This subclass includes:
- manufacture of laboratory type sensitive balances
- manufacture of drawing, marking-out or mathematical calculating instruments:
. measuring rods and tapes, micrometers, callipers and gauges, etc.
- manufacture of microscopes other than optical microscopes and diffraction apparatus
- manufacture of apparatus for measuring or checking non-electrical quantities:
. radiation detectors and counters, apparatus for testing and regulating vehicle motors, etc.
- manufacture of navigational, meteorological, geophysical and related instruments and apparatus:
. surveying instruments, oceanographic or hydrological instruments, seismometers, range-finders, automatic pilots, sextants, ultrasonic sounding instruments, air navigation instruments and systems
- manufacture of electricity supply meters and supply meters for water, gas, petrol, etc.
- manufacture of machines and appliances for testing the mechanical properties of materials
- manufacture of instruments and apparatus for carrying out physical or chemical analyses:
. polarimeters, photometers, refractometers, colorimeters, spectrometers, pH-meters, viscometers, surface tension instruments, etc.
- manufacture of instruments and apparatus for measuring or checking the flow, level, pressure or other variables of liquids or gases:
. flow meters, level gauges, manometers, heat meters, etc.
- manufacture of diverse measuring, checking or testing instruments, apparatus or machines:
. hydrometers, thermometers, barometers, revolution counters, taximeters, pedometers, tachometers, balancing machines, test benches, comparators, etc.

This subclass also includes:
- manufacture of optical type measuring and checking appliances and instruments

This subclass excludes:
- manufacture of pumps incorporating measuring devices cf. 29.12/1
- manufacture of medical and surgical instruments cf. 33.10
- manufacture of industrial process control equipment cf. 33.30
- manufacture of binoculars, monoculars and similar optical devices cf. 33.40/2
- manufacture of optical microscopes cf. 33.40/2

This subclass includes:
- design and assembly of automated production plants consisting of various machines, handling devices and centralised controlling apparatus

This subclass includes:
- design and assembly of industrial continuous process control systems

This subclass includes:
- manufacture of optical elements mounted or not:
. spectacle lenses and contact lenses
. spectacle frames and frames fitted with lenses whether or not the lenses are optically worked: sun-glasses, protective glasses, corrective glasses, etc.
. unworked optical elements other than of glass
. prisms, lenses, optical mirrors, colour filters, polarising elements, etc. of glass or other material
. optical fibres and optical fibre cables for live transmission of images: endoscopy, lighting, live images

This subclass excludes:
- manufacture of unworked glass optical elements cf. 26.15
- manufacture of optical fibre cables for coded data transmission cf. 31.30

This subclass includes:
- manufacture of optical instruments:
. optical microscopes, equipment for microphotography and micro projection, magnifying glasses, reading glasses, thread counters, etc.
. binoculars, sight telescopes, telescopic sights and observation telescopes, astronomical equipment, etc.
. lasers, but excluding laser diodes, etc.

This subclass excludes:
- manufacture of microscopes other than optical cf. 33.20
- manufacture of optical type measuring and checking appliances and instruments cf. 33.20

This subclass includes:
- manufacture of photographic and cinematographic equipment:
. cameras
. image projectors, enlargers and reducers
. discharge lamps ("electronic") and other flashlight apparatus
. apparatus and equipment for photographic and cinematographic laboratories, apparatus for the projection of circuit patterns on sensitised semi-conductor materials, projection screens

This subclass excludes:
- manufacture of photochemical products cf. 24.64
- manufacture of photographic flashbulbs cf. 31.50
- manufacture of television cameras cf. 32.20/2

This class includes:
- manufacture of clocks and watches of all kinds, including instrument panel clocks; watch and clock cases, including cases of noble metals; movements of all kinds for watches and clocks
- manufacture of time recording equipment and equipment for measuring, recording and otherwise displaying intervals of time, e.g. parking meters, process timers, time switches and other releases
- manufacture of components for clocks and watches, such as springs, jewels, dials, hands, metal watch bands and bracelets, plates, bridges and other parts

This class excludes:
- manufacture of non-metallic watch bands cf. 19.20