| Subject | English | Estonian |
| tech. | acoustic signal | helisignaal |
| comp., MS | busy signal | kinnine toon (The indication that the phone is busy) |
| commun. | call signal | kutsung |
| fin. | carbon price signal | COSUB2SUB-hinnasignaal |
| comp., MS | cellular signal | mobiilsidesignaal (The signal between a cellular phone and the mobile operator's network that allows the user to access the Internet and make phone calls using a cellular phone. A telecommunications standard that lets users send and receive messages that include rich text, images, audio, and video) |
| fin. | false or misleading signals | valed või eksitavad märguanded |
| obs., fin. | false or misleading signals | väärad või eksitavad teated |
| commun. | internet signalling transport protocol | interneti signaliseerimisprotokoll |
| comp., MS | production signal | tootmismärguanne (A documented notification of a resource flow event that triggers a production or transfer activity) |
| fin. | risk of negative signalling | negatiivsete signaalide andmise risk |
| transp., avia. | signal area | signaalmärkide ala |
| comp., MS | signal event | signaaliteade (In a statechart or activity diagram, an indication that one object has received a signal from another. A signal can be declared by using the keyword signal on a class in a class diagram) |
| med., chem., tech. | signal/noise ratio | signaali-müra suhe |
| med., chem., tech. | signal-to-noise ratio | signaali-müra suhe |
| chem. | signal word | tunnussõna |
| commun. | sound signal | helisignaal |
| commun. | standard frequency and time signal satellite service | etalonsageduse ja -aja satelliitteenistus |
| commun. | standard frequency and time signal service | etalonsageduse ja -aja teenistus |
| commun., el. | standard frequency and time signal station | etalonsageduse ja -aja raadiosaatja |
| transp. | TSI Control Command and Signalling for High Speed and Conventional Rail systems | kiir- ja tavaraudteesüsteemi kontrolli ja signaalimise KTK |
| transp., mil., grnd.forc., el. | turn signal light | suunatulelatern |
