Cov ntaub ntawv ntiag tug

kev taw qhia

Nws qhia meej qhov tseem ceeb rau cov neeg siv kev ceev ntiag tug.Kev ceev ntiag tug yog koj txoj cai tseem ceeb.Thaum koj siv peb cov kev pabcuam, peb tuaj yeem sau thiab siv koj cov ntaub ntawv ntsig txog.Peb cia siab tias yuav qhia rau koj los ntawm txoj cai ntiag tug no piav qhia seb peb khaws, siv, khaws thiab faib cov ntaub ntawv no li cas thaum siv peb cov kev pabcuam, thiab peb muab txoj hauv kev rau koj nkag mus, hloov kho, tswj thiab tiv thaiv cov ntaub ntawv no.Txoj Cai Tswjfwm Ntiag Tug no thiab cov ntaub ntawv kev pabcuam koj siv yog ze ze rau cov ntaub ntawv pabcuam.Kuv vam tias koj tuaj yeem nyeem nws kom zoo thiab ua raws li txoj cai ntiag tug no thaum tsim nyog thiab ua cov kev xaiv uas koj xav tias tsim nyog.Cov ntsiab lus hais txog kev koom nrog hauv Txoj Cai Tswjfwm Ntiag Tug no peb yuav sim peb qhov zoo tshaj plaws los qhia nws hauv txoj hauv kev yooj yim thiab muab cov kev sib txuas rau kev piav qhia ntxiv rau koj qhov kev nkag siab.

Los ntawm kev siv lossis txuas ntxiv siv peb cov kev pabcuam, koj pom zoo nrog peb los sau, siv, khaws cia thiab qhia koj cov ntaub ntawv ntsig txog raws li txoj cai ntiag tug no.

Yog tias koj muaj lus nug txog txoj cai ntiag tug no lossis lwm yam teeb meem, thov hu rautjshenglida@126.comTiv tauj peb.

Cov ntaub ntawv peb tuaj yeem sau

Thaum peb muab kev pabcuam, peb tuaj yeem sau, khaws thiab siv cov ntaub ntawv hauv qab no ntsig txog koj.Yog tias koj tsis muab cov ntaub ntawv cuam tshuam, koj yuav tsis tuaj yeem sau npe ua peb tus neeg siv lossis txaus siab rau qee qhov kev pabcuam uas peb muab, lossis koj yuav tsis tuaj yeem ua tiav cov txiaj ntsig ntawm cov kev pabcuam cuam tshuam.

Cov ntaub ntawv koj muab

Cov ntaub ntawv ntsig txog tus kheej muab rau peb thaum koj sau npe koj tus account lossis siv peb cov kev pabcuam, xws li xov tooj, email, thiab lwm yam;

Cov ntaub ntawv qhia koj muab rau lwm tus los ntawm peb cov kev pabcuam thiab cov ntaub ntawv koj khaws thaum siv peb cov kev pabcuam.

Koj cov ntaub ntawv qhia los ntawm lwm tus

Muab cov ntaub ntawv qhia txog koj muab los ntawm lwm tus thaum siv peb cov kev pabcuam.

Peb tau txais koj cov ntaub ntawv

Thaum koj siv qhov kev pabcuam, peb tuaj yeem sau cov ntaub ntawv hauv qab no:

Cov ntaub ntawv teev npe yog hais txog cov ntaub ntawv xov xwm uas lub kaw lus yuav cia li sau los ntawm ncuav qab zib, lub vev xaib beacon lossis lwm yam txhais tau tias thaum koj siv peb cov kev pabcuam, suav nrog: cov ntaub ntawv ntaus ntawv lossis software, xws li cov ntaub ntawv teeb tsa los ntawm koj lub xov tooj ntawm tes, web browser lossis lwm yam kev pabcuam. siv los nkag tau rau peb cov kev pabcuam, koj qhov chaw nyob IP, tus qauv thiab tus lej cim npe siv los ntawm koj lub xov tooj ntawm tes;

Cov ntaub ntawv koj tshawb lossis tshawb xyuas thaum siv peb cov kev pabcuam, xws li cov lus tshawb hauv lub vev xaib uas koj siv, qhov chaw nyob URL ntawm nplooj ntawv social media uas koj mus ntsib, thiab lwm yam ntaub ntawv thiab cov ntsiab lus uas koj xauj lossis thov thaum siv peb cov kev pabcuam;Cov ntaub ntawv hais txog cov ntawv thov mobile (APPs) thiab lwm yam software uas koj tau siv, thiab cov ntaub ntawv hais txog cov ntawv thov mobile thiab software koj tau siv;

Cov ntaub ntawv hais txog koj qhov kev sib txuas lus los ntawm peb cov kev pabcuam, xws li tus lej account koj tau sib tham nrog, nrog rau lub sijhawm sib txuas lus, cov ntaub ntawv thiab sijhawm ntev;

Cov ntaub ntawv chaw nyob yog hais txog cov ntaub ntawv hais txog koj qhov chaw khaws cia thaum koj qhib lub cuab yeej qhov chaw ua haujlwm thiab siv cov kev pabcuam cuam tshuam los ntawm Asmeskas raws li qhov chaw nyob, suav nrog:

● Koj cov ntaub ntawv nyob hauv thaj chaw uas tau sau los ntawm GPS lossis WiFi thaum koj siv peb cov kev pabcuam los ntawm cov khoom siv txawb nrog kev ua haujlwm;

● Cov ntaub ntawv lub sijhawm tiag tiag suav nrog koj qhov chaw thaj chaw uas koj lossis lwm tus neeg siv, xws li cov ntaub ntawv ntawm koj cheeb tsam uas muaj nyob rau hauv cov ntaub ntawv nyiaj txiag muab los ntawm koj, cov ntaub ntawv sib qhia uas qhia koj qhov chaw nyob tam sim no lossis yav dhau los ntawm koj lossis lwm tus, thiab thaj chaw. Cov ntaub ntawv cim npe muaj nyob hauv cov duab qhia los ntawm koj lossis lwm tus;

Koj tuaj yeem txwv tsis pub sau koj cov ntaub ntawv chaw nyob ntawm thaj chaw los ntawm kev kaw qhov chaw tso haujlwm.

Peb yuav siv cov ntaub ntawv li cas

Peb tuaj yeem siv cov ntaub ntawv khaws tseg hauv cov txheej txheem muab kev pabcuam rau koj rau lub hom phiaj hauv qab no:

● muab kev pabcuam rau koj;

● thaum peb muab kev pabcuam, nws yog siv rau kev lees paub, kev pabcuam rau cov neeg siv khoom, kev tiv thaiv kev ruaj ntseg, kev saib xyuas kev dag ntxias, kev khaws cia thiab thaub qab kom ntseeg tau tias kev ruaj ntseg ntawm cov khoom thiab cov kev pabcuam peb muab rau koj;

● Pab peb tsim cov kev pabcuam tshiab thiab txhim kho peb cov kev pabcuam uas twb muaj lawm;Ua rau peb paub ntau ntxiv txog seb koj nkag mus thiab siv peb cov kev pabcuam li cas, txhawm rau teb rau koj cov kev xav tau ntawm tus kheej, xws li kev teeb tsa lus, chaw teeb tsa, kev pabcuam tus kheej thiab cov lus qhia, lossis teb rau koj thiab lwm tus neeg siv hauv lwm yam;

● muab kev tshaj tawm uas cuam tshuam rau koj los hloov cov kev tshaj tawm uas feem ntau muab tso rau;Txheeb xyuas qhov ua tau zoo ntawm kev tshaj tawm thiab lwm yam kev tshaj tawm thiab kev tshaj tawm hauv peb cov kev pabcuam thiab txhim kho lawv;Software certification los yog tswj software upgrade;Cia koj koom nrog hauv kev soj ntsuam ntawm peb cov khoom thiab kev pabcuam.

Txhawm rau ua kom koj muaj kev paub zoo dua, txhim kho peb cov kev pabcuam lossis lwm lub hom phiaj uas koj pom zoo, ntawm lub hauv paus ntawm kev ua raws li cov kev cai thiab cov cai, peb yuav siv cov ntaub ntawv sau los ntawm ib qho kev pabcuam rau peb lwm cov kev pabcuam hauv kev sau ntaub ntawv los yog tus kheej.Piv txwv li, cov ntaub ntawv khaws tseg thaum koj siv ib qho ntawm peb cov kev pabcuam yuav raug siv hauv lwm qhov kev pabcuam los muab cov ntsiab lus tshwj xeeb rau koj, lossis qhia koj cov ntaub ntawv ntsig txog koj uas feem ntau tsis raug thawb.Yog tias peb muab cov kev xaiv sib xws hauv cov kev pabcuam cuam tshuam, koj tuaj yeem tso cai rau peb siv cov ntaub ntawv muab thiab khaws cia los ntawm kev pabcuam rau peb lwm cov kev pabcuam.

Koj nkag mus thiab tswj koj cov ntaub ntawv tus kheej li cas

Peb yuav ua txhua yam ua tau kom siv cov txheej txheem tsim nyog los xyuas kom meej tias koj tuaj yeem nkag mus, hloov kho thiab kho koj cov ntaub ntawv sau npe lossis lwm cov ntaub ntawv ntiag tug muab thaum siv peb cov kev pabcuam.Thaum nkag mus, hloov kho, kho thiab tshem tawm cov ntaub ntawv saum toj no, peb yuav xav kom koj txheeb xyuas kom ntseeg tau tias kev ruaj ntseg ntawm koj tus account.

Cov ntaub ntawv peb tuaj yeem qhia

Tsuas yog cov xwm txheej hauv qab no, peb thiab peb cov koom tes yuav tsis qhia koj cov ntaub ntawv ntiag tug rau lwm tus neeg sab nrauv yam tsis tau koj tso cai.

Peb thiab peb cov koom tes tuaj yeem qhia koj cov ntaub ntawv ntiag tug nrog peb cov koom tes, cov koom tes thiab cov neeg muab kev pabcuam thib peb, cov neeg cog lus thiab cov neeg sawv cev (xws li cov chaw pabcuam kev sib txuas lus uas xa email lossis xa ntawv ceeb toom rau peb, daim ntawv qhia chaw muab kev pabcuam uas muab cov ntaub ntawv rau peb) (lawv yuav tsis nyob hauv koj qhov kev txiav txim), Rau cov laj thawj hauv qab no:

● muab peb cov kev pabcuam rau koj;

● Ua tiav lub hom phiaj tau piav qhia hauv ntu "peb yuav siv cov ntaub ntawv li cas";

● Ua peb cov luag num thiab siv peb cov cai nyob rau hauv daim ntawv cog lus pab Qiming los yog txoj cai ntiag tug no;

● nkag siab, tswj hwm thiab txhim kho peb cov kev pabcuam.

● Ua tiav lub hom phiaj tau piav qhia hauv ntu "peb yuav siv cov ntaub ntawv li cas";

● Ua peb cov luag num thiab siv peb cov cai nyob rau hauv daim ntawv cog lus pab Qiming los yog txoj cai ntiag tug no;

● nkag siab, tswj hwm thiab txhim kho peb cov kev pabcuam.

Yog tias peb lossis peb cov koom tes sib koom koj cov ntaub ntawv ntiag tug nrog ib tus neeg thib peb uas tau hais los saum toj no, peb yuav siv zog ua kom cov neeg thib peb ua raws li Txoj Cai Tswjfwm Ntiag Tug no thiab lwm yam kev txwv tsis pub lwm tus paub thiab kev nyab xeeb uas peb xav kom lawv ua raws thaum siv koj tus kheej. cov ntaub ntawv.

Nrog rau kev txhim kho txuas ntxiv ntawm peb txoj kev lag luam, peb thiab peb cov tuam txhab koom nrog tuaj yeem ua kev sib koom ua ke, kev yuav khoom, kev hloov khoom vaj khoom tsev lossis kev lag luam zoo sib xws, thiab koj cov ntaub ntawv ntiag tug yuav raug xa mus ua ib feem ntawm cov kev hloov pauv.Peb yuav qhia rau koj ua ntej kev hloov.

Peb lossis peb cov koom tes kuj tseem tuaj yeem khaws, khaws lossis nthuav tawm koj cov ntaub ntawv ntiag tug rau lub hom phiaj hauv qab no:

● Ua raws li kev cai lij choj thiab kev tswj hwm;Ua raws li lub tsev hais plaub txiav txim los yog lwm yam kev cai lij choj;Ua raws li cov cai ntawm tsoomfwv cov cai.

Siv qhov tsim nyog tsim nyog los ua raws li cov cai thiab cov kev cai siv, tiv thaiv kev sib raug zoo thiab pej xeem cov txiaj ntsig, lossis tiv thaiv tus kheej thiab vaj tse kev nyab xeeb lossis cov cai thiab kev txaus siab ntawm peb cov neeg siv khoom, peb lub tuam txhab, lwm tus neeg siv lossis cov neeg ua haujlwm.

cov ntaub ntawv kev nyab xeeb

Peb tsuas yog khaws koj cov ntaub ntawv ntiag tug rau lub sijhawm tsim nyog rau lub hom phiaj tau teev tseg hauv Txoj Cai Tswjfwm Ntiag Tug no thiab lub sijhawm txwv uas yuav tsum muaj los ntawm cov cai thiab cov cai.

Peb siv ntau yam kev ruaj ntseg thev naus laus zis thiab cov txheej txheem los tiv thaiv kev poob, kev siv tsis raug, kev nyeem ntawv tsis raug cai lossis nthuav tawm cov ntaub ntawv.Piv txwv li, hauv qee qhov kev pabcuam, peb yuav siv thev naus laus zis encryption (xws li SSL) los tiv thaiv tus kheej cov ntaub ntawv koj muab.Txawm li cas los xij, thov nkag siab tias vim muaj kev txwv ntawm kev siv thev naus laus zis thiab ntau yam kev ua phem, hauv Internet kev lag luam, txawm tias peb sim peb qhov zoo tshaj plaws los txhawb kev ntsuas kev nyab xeeb, nws tsis yooj yim sua kom muaj 100% kev ruaj ntseg ntawm cov ntaub ntawv.Koj yuav tsum paub tias cov kab ke thiab kev sib txuas lus uas koj siv los nkag rau peb cov kev pabcuam yuav muaj teeb meem vim muaj ntau yam dhau ntawm peb txoj kev tswj hwm.

Cov ntaub ntawv koj qhia

Ntau yam ntawm peb cov kev pabcuam tso cai rau koj tshaj tawm koj cov ntaub ntawv tseem ceeb tsis yog nrog koj tus kheej lub network nkaus xwb, tab sis kuj nrog txhua tus neeg siv cov kev pabcuam, xws li cov ntaub ntawv koj upload lossis tshaj tawm hauv peb qhov kev pabcuam (xws li koj cov ntaub ntawv ntiag tug pej xeem, cov npe koj. tsim), koj cov lus teb rau cov ntaub ntawv upload lossis luam tawm los ntawm lwm tus, Thiab suav nrog cov ntaub ntawv qhov chaw thiab cov ntaub ntawv teev npe ntsig txog cov ntaub ntawv no.Lwm tus neeg siv peb cov kev pabcuam kuj tseem tuaj yeem qhia cov ntaub ntawv ntsig txog koj (nrog rau cov ntaub ntawv qhov chaw thiab cov ntaub ntawv teev cia).Tshwj xeeb, peb cov kev pabcuam kev sib raug zoo yog tsim los pab koj los qhia cov ntaub ntawv nrog cov neeg siv thoob ntiaj teb.Koj tuaj yeem ua cov ntaub ntawv sib qhia sib kis hauv lub sijhawm thiab dav.Tsuav koj tsis rho tawm cov ntaub ntawv sib koom, cov ntaub ntawv cuam tshuam yuav nyob twj ywm hauv pej xeem sau;Txawm hais tias koj rho tawm cov ntaub ntawv sib koom, cov ntaub ntawv tseem ceeb tseem tuaj yeem raug cached, theej lossis khaws cia los ntawm lwm tus neeg siv lossis cov neeg thib peb uas tsis muaj feem cuam tshuam dhau ntawm peb kev tswj hwm, lossis khaws cia rau hauv pej xeem sau los ntawm lwm tus neeg siv lossis cov neeg thib peb.

Yog li ntawd, thov ua tib zoo xav txog cov ntaub ntawv upload, luam tawm thiab sib pauv los ntawm peb cov kev pabcuam.Qee qhov xwm txheej, koj tuaj yeem tswj hwm qhov ntau ntawm cov neeg siv uas muaj txoj cai los tshawb xyuas koj cov ntaub ntawv sib koom los ntawm cov chaw ntiag tug ntawm qee qhov ntawm peb cov kev pabcuam.Yog tias koj xav tau tshem tawm koj cov ntaub ntawv cuam tshuam los ntawm peb cov kev pabcuam, thov ua haujlwm raws li tau muab los ntawm cov kev pabcuam tshwj xeeb no.

Cov ntaub ntawv tus kheej rhiab heev uas koj qhia

Qee cov ntaub ntawv tus kheej yuav raug suav hais tias yog qhov tseem ceeb vim nws qhov tshwj xeeb, xws li koj haiv neeg, kev ntseeg, kev noj qab haus huv ntawm tus kheej thiab cov ntaub ntawv kho mob.Cov ntaub ntawv tus kheej rhiab heev yog tiv thaiv nruj dua li lwm cov ntaub ntawv tus kheej.

Thov nco ntsoov tias cov ntsiab lus thiab cov ntaub ntawv koj muab, upload lossis tshaj tawm thaum siv peb cov kev pabcuam (xws li cov duab ntawm koj cov haujlwm hauv zej zog) tuaj yeem nthuav tawm koj cov ntaub ntawv ntiag tug.Koj yuav tsum ua tib zoo xav seb puas yuav nthuav tawm cov ntaub ntawv tseem ceeb ntawm tus kheej thaum siv peb cov kev pabcuam.

Koj pom zoo ua cov ntaub ntawv koj tus kheej rhiab rau cov hom phiaj thiab raws li tau piav qhia hauv txoj cai ntiag tug no.

Peb tuaj yeem sau cov ntaub ntawv li cas

Peb tuaj yeem sau thiab siv koj cov ntaub ntawv los ntawm cov ncuav qab zib thiab lub web beacon thiab khaws cov ntaub ntawv xws li cov ntaub ntawv teev cia.

Peb siv peb tus kheej cov ncuav qab zib thiab webeacon los muab koj cov kev paub siv tus kheej thiab cov kev pabcuam ntxiv rau cov hom phiaj hauv qab no:

● Nco ntsoov koj yog leej twg.Piv txwv li, ncuav qab zib thiab lub vev xaib beacon pab peb txheeb xyuas koj li peb cov neeg siv npe, lossis txuag koj qhov kev nyiam lossis lwm yam ntaub ntawv koj muab rau peb;

● txheeb xyuas koj kev siv peb cov kev pabcuam.Piv txwv li, peb tuaj yeem siv cov ncuav qab zib thiab webeacon kom paub tias koj siv peb cov kev pabcuam rau dab tsi, lossis cov nplooj ntawv web lossis cov kev pabcuam twg nyiam tshaj rau koj.

● advertising optimization.Cov ncuav qab zib thiab lub vev xaib beacon pab peb muab kev tshaj tawm ntsig txog koj raws li koj cov ntaub ntawv ntau dua li kev tshaj tawm.

Thaum siv cov ncuav qab zib thiab webeacon rau cov hom phiaj saum toj no, peb tuaj yeem muab cov ntaub ntawv tsis yog tus kheej sau los ntawm cov ncuav qab zib thiab lub vev xaib rau cov neeg tshaj tawm lossis lwm tus neeg koom tes tom qab kev txheeb xyuas cov neeg siv khoom siv peb cov kev pabcuam thiab kev pabcuam tshaj tawm.

Tej zaum yuav muaj cov ncuav qab zib thiab lub web beacons tso los ntawm cov tshaj tawm lossis lwm tus neeg koom tes ntawm peb cov khoom thiab cov kev pabcuam.Cov ncuav qab zib thiab lub vev xaib no tuaj yeem sau cov ntaub ntawv tsis qhia tus kheej ntsig txog koj los txheeb xyuas seb cov neeg siv siv cov kev pabcuam no li cas, xa koj cov ntawv tshaj tawm uas koj xav tau, lossis ntsuas qhov ua tau zoo ntawm cov kev pabcuam tshaj tawm.Kev sau thiab siv cov ntaub ntawv zoo li no los ntawm cov ncuav qab zib thib peb thiab lub web beacons tsis yog khi los ntawm txoj cai ntiag tug no, tab sis los ntawm txoj cai ntiag tug ntawm cov neeg siv cuam tshuam.Peb tsis muaj lub luag haujlwm rau cov ncuav qab zib lossis webeacon ntawm peb tog.

Koj tuaj yeem tsis lees paub lossis tswj cov ncuav qab zib lossis webeacon los ntawm qhov browser nqis.Txawm li cas los xij, thov nco ntsoov tias yog tias koj lov tes taw ncuav qab zib lossis lub web beacon, koj yuav tsis txaus siab rau qhov kev pabcuam zoo tshaj plaws, thiab qee qhov kev pabcuam yuav tsis ua haujlwm zoo.Tib lub sijhawm, koj yuav tau txais tib qhov kev tshaj tawm, tab sis cov kev tshaj tawm no yuav tsis cuam tshuam rau koj.

Cov lus thiab cov ntaub ntawv peb tuaj yeem xa tuaj rau koj

Xa ntawv thiab ntaub ntawv thawb

Thaum koj siv peb cov kev pabcuam, peb yuav siv koj cov ntaub ntawv xa email, xov xwm lossis xa ntawv ceeb toom rau koj lub cuab yeej.Yog tias koj tsis xav tau txais cov ntaub ntawv no, koj tuaj yeem xaiv tshem tawm ntawm lub cuab yeej raws li peb cov lus qhia cuam tshuam.

Kev tshaj tawm txog kev pabcuam

Peb tuaj yeem tshaj tawm cov lus tshaj tawm txog kev pabcuam rau koj thaum tsim nyog (piv txwv li, thaum muaj kev pabcuam raug ncua vim kev saib xyuas lub cev).Tej zaum koj yuav tsis tuaj yeem tshem tawm cov kev tshaj tawm txog kev pabcuam uas tsis yog kev tshaj tawm.

Scope ntawm txoj cai ntiag tug

Tsuas yog qee qhov kev pabcuam tshwj xeeb, tag nrho peb cov kev pabcuam raug ua raws li txoj cai ntiag tug no.Cov kev pabcuam tshwj xeeb no yuav raug rau cov cai ntiag tug tshwj xeeb.Cov cai ntiag tug tshwj xeeb rau cov kev pabcuam tshwj xeeb yuav piav qhia ntau ntxiv txog seb peb siv koj cov ntaub ntawv li cas hauv cov kev pabcuam no.Txoj cai ntiag tug rau qhov kev pabcuam tshwj xeeb no yog ib feem ntawm txoj cai ntiag tug no.Yog tias muaj kev tsis sib haum xeeb ntawm txoj cai ntiag tug ntawm cov kev pabcuam tshwj xeeb thiab txoj cai ntiag tug no, txoj cai ntiag tug ntawm cov kev pabcuam tshwj xeeb yuav raug siv.

Tshwj tsis yog tias tau teev tseg rau hauv txoj cai tswjfwm ntiag tug no, cov lus siv nyob rau hauv cov lus qhia ntiag tug no yuav muaj lub ntsiab lus zoo ib yam li cov uas tau teev tseg hauv Qiming kev pom zoo.

Thov nco ntsoov tias txoj cai ntiag tug no tsis siv rau cov xwm txheej hauv qab no:

● cov ntaub ntawv sau los ntawm cov kev pabcuam thib peb (nrog rau cov vev xaib thib peb) nkag los ntawm peb cov kev pabcuam;

● cov ntaub ntawv sau los ntawm lwm lub tuam txhab lossis cov koom haum uas muab kev tshaj tawm hauv peb cov kev pabcuam.

● cov ntaub ntawv sau los ntawm lwm lub tuam txhab lossis cov koom haum uas muab kev tshaj tawm hauv peb cov kev pabcuam.

Hloov

Peb tuaj yeem hloov kho cov ntsiab lus ntawm txoj cai ntiag tug no ib ntus, thiab cov kev hloov pauv no yog ib feem ntawm txoj cai ntiag tug.Yog tias qhov kev hloov pauv no ua rau muaj kev txo qis ntawm koj cov cai raws li txoj cai ntiag tug no, peb yuav ceeb toom rau koj los ntawm kev ceeb toom tseem ceeb ntawm nplooj ntawv home lossis email lossis lwm txoj hauv kev ua ntej qhov kev hloov pauv yuav pib.Hauv qhov no, yog tias koj txuas ntxiv siv peb cov kev pabcuam, koj pom zoo yuav raug khi los ntawm txoj cai tswjfwm ntiag tug kho dua tshiab.

 


0f2b06b71b81d66594a2b16677d6d15