What does this laundry symbol mean?

Number or letters in a triangle on packaging? What recycling codes like 5 PP, PAP 20, ALU 41 and C/PAP 84 mean →

Red-bordered diamond on a bottle? What the nine hazard pictograms on chemical labels mean →

Fan, zigzag or snowflake on an oven dial? What oven function symbols mean, found by shape →

An H, a P or a padlock on the hob? What hob symbols mean: residual heat, boost, pan detection, pause →

Wavy lines, a snowflake or a zigzag on the microwave? What microwave symbols mean: power levels, defrost, grill and combi →

Double square, crossed-out bin or IP44 on a charger? What the marks on chargers and appliances mean, and an IP-code decoder →

Wavy lines, a snowflake or a glass and fork on a tub or pan? What microwave-, dishwasher-, freezer- and oven-safe symbols mean →

Hourglass, LOT or a crossed-out 2 on a medical pack? What medical packaging symbols mean →

Spiral, T-shirt or snowflake on the washing machine? What washing-machine and dryer symbols mean →

kWh per 100 cycles, a falling phone or a tyre in the rain on a label? What every EU energy-label icon means →

Snowflake, water drop or sun on the air-conditioner remote? What air-conditioner remote symbols mean, found by shape →

Two arrows in an S, a starburst or a tap lit on the dishwasher? What dishwasher lights and buttons mean, found by shape →

Three stars or four on the freezer, a snowflake or a sun on the fridge panel? What fridge and freezer star ratings and buttons mean, with the temperature each star stands for →

A flame, a tap or a spanner on the boiler, or 1 to 5 on a radiator valve? What boiler lights and radiator-valve numbers mean, with each maker’s setting temperatures →

An open jar with 12M, a hand in a book or ℮ on a cream? What the symbols on cosmetics mean, and what the cruelty-free, vegan and organic logos certify →

Up arrows, a wine glass or a battery in a hatched box on a parcel? What the handling and dangerous-goods marks on parcels mean →

Smoke alarm chirping, flashing red or talking? What each beep, chirp and light means on Kidde, First Alert, FireAngel, Aico, Nest Protect, X-Sense and Ei alarms →

Coffee machine blinking orange, or a descale light on? What the lights mean on Keurig, Nespresso, De’Longhi, Philips, Sage and JURA machines, from each maker’s manual →

A moon, a key, an R or a green dot at the top of your phone? What the status icons on an iPhone, Samsung Galaxy or Pixel mean, found by shape →

A red dot, a water drop, two masks or a green running man on your watch? What the small icons on an Apple Watch, Galaxy Watch, Pixel Watch or Fitbit, and Garmin mean, found by shape →

Broadband hub light orange, red or flashing? What each router light means on BT, EE, Sky, Virgin Media, Vodafone, TalkTalk, Plusnet, Xfinity, AT&T and Verizon hubs →

AirPods case flashing amber, Galaxy Buds light red or Pixel Buds case blinking orange? What the light on an earbuds charging case means for AirPods, Galaxy Buds, Pixel Buds, Sony, Bose and Jabra, by colour and how it blinks →

PS5 blinking blue, Xbox controller flashing or Switch dock light not green? What the light on a PlayStation, Xbox or Nintendo Switch console, controller or dock means, from each maker’s own support page →

Roomba light ring red, Roborock saying “Error 9”, a Shark error code or a eufy RoboVac beeping? What a robot vacuum’s light, error number, voice message or beeps mean on iRobot Roomba, Roborock, Shark, eufy and Samsung, from each maker’s own support page →

Ring doorbell spinning blue, Nest Doorbell blinking yellow or Blink button red? What the light on a Ring, Google Nest, Blink, Arlo or eufy video doorbell means, by colour and whether it spins, flashes or lights only half the ring →

Nest showing E73 or N72, Hive receiver light red or amber, Honeywell “Cool On” blinking or an ecobee saying “Calibrating”? What the light, symbol, code or message on a Nest, Hive, Honeywell, ecobee, tado, Wiser or Sensi thermostat means, from each maker’s own help page →

Tesla Wall Connector blinking red three times, zappi light pink, Pod Point solid yellow or a Wallbox turquoise? What the light on a home EV charger means on Tesla, myenergi zappi, Ohme, Pod Point, Wallbox, Easee, Hypervolt, ChargePoint and Emporia, by colour, movement and flash count, from each maker’s own help page or manual →

LiftMaster arrows flashing 4 up and 1 down, opener lights blinking 10 times or a Genie green light blinking 5 times? What the blinking light on a LiftMaster, Chamberlain or Genie garage door opener means, by which light flashes and how many times, from each maker’s own help site →

Sony TV red light blinking 6 times, a Panasonic LED blinking red or orange, or a Philips light flashing and the TV will not start? What the standby or power light on a Sony, Philips, Panasonic, TCL or Hisense TV means, by colour and how it blinks, from each maker’s own support site →

Dell battery light blinking 2 amber then 3 white, an HP caps lock light blinking 3 long and 2 short, or a ThinkPad charge light blinking orange and white? What the blinking power, battery or caps lock light on a Dell, HP, Lenovo ThinkPad or ASUS laptop means, count by count, from each maker’s own support site →

Rheem water heater light blinking red 4 times, an A.O. Smith status light flashing twice or a Bradford White blinking 7 times? What the flashing status light on a Rheem, A.O. Smith, State or Bradford White gas water heater means, flash by flash, from each maker’s own manual, with the maker’s gas-smell instructions first →

Alexa light yellow, Nest Mini orange or HomePod flashing white? What each smart speaker light means on Amazon Echo, Google Nest, Apple HomePod, Sonos and Bose SoundLink Max, by colour and how it moves →

“High leak”, an icon with a line through it or a flashing start button on your CPAP machine? What CPAP machine icons, messages and lights mean on ResMed AirSense and AirMini, Philips DreamStation 2, F&P SleepStyle and Luna G3, from each maker’s manual →

Printer lights blinking, or an orange lamp flashing 5 times? What the light patterns mean on HP, Epson, Canon and Brother printers, from each maker’s own guide →

Red, cream, blue, black or yellow band on a fire extinguisher, or an A, B, C, F or K on the label? What each extinguisher colour and fire-class letter means, in the UK and US guidance’s own words →

Green running man, blue circle, red ring with a bar or yellow triangle on a wall at work? What each workplace safety sign means, by colour and shape, with its ISO 7010 number (E001, F001, M003, P002, W012 …) →

⌘, ⌥, ⌃ or ⇧ in a Mac menu, or a key with an arrow or a box with an X? What each Mac and PC keyboard symbol means, with the matching PC key and the Unicode character to copy →