Nist.gov - SEO Checker

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Visión general del análisis SEO
Metadatos
80% 
Calidad de la página
94% 
Estructura
79% 
Enlazado
90% 
Servidor
86% 
Factores externos
100% 
Puntuación SEO
Tiempo de carga
1,11 s
Tamaño HTML
87,70 kB
Palabras
662
Medios
19
Cantidad de enlaces
134 internos / 19 externos

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Metadatos

Título
(Extremadamente importante)
National Institute of Standards and Technology
La longitud del título es óptima (415 píxeles de una longitud máxima de 580 píxeles).
No se repite ninguna palabra en el título.
Meta descripción
(Extremadamente importante)
NIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life
La meta descripción es demasiado larga: 1000 píxelesOptimizar la descripción.
Rastreabilidad
(Extremadamente importante)
No se detectan problemas para acceder al sitio web.
Redirección canónica
(Importante)
https://www.nist.gov/
La página tiene una redirección canónica correcta.
Idioma
(Poco importante)
Idioma reconocido automáticamente en el contenido: en
Idioma declarado en el código HTML: en
Ubicación geográfica del servidor: Estados Unidos de América
El idioma ha sido correctamente declarado en el código HTML: en.
Enlaces Alternate/Hreflang
(Poco importante)
No se ha encontrado ningún enlace alternativo (alternate) en esta página.
Otras Metaetiquetas
(Poco importante)
No se detecta ninguna metaetiqueta de paginación rel next en la página.
No se detecta ninguna metaetiqueta de paginación rel prev en la página.
Dominio
(Poco importante)
El dominio no es un subdominio.
La longitud del nombre del dominio es buena.
El dominio no contiene caracteres especiales.
URL de la página
(Poco importante)
No se detecta ningún parámetro dinámico en la URL.
No se detecta ningún ID de sesión en la URL.
La URL no contiene demasiados subdirectorios.
Codificación de caracteres
(Poco importante)
La codificación de caracteres (UTF-8) ha sido declarada correctamente.
Doctype
(Deseable)
La etiqueta doctype HTML 5 está configurada correctamente.
La declaración del doctype se ubica al inicio del código HTML.
Favicon
(Deseable)
El favicon está enlazado correctamente.

Metaetiquetas

NombreValor
descriptionNIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life
citation_titleNational Institute of Standards and Technology | NIST
dcterms.titleNational Institute of Standards and Technology
dcterms.subjectWorking with industry and science to advance innovation and improve quality of life.
dcterms.typetext
dcterms.formattext/html
dcterms.identifierhttps://www.nist.gov/national-institute-standards-and-technology
dcterms.sourceNIST
dcterms.modified2025-05-20T10:02-04:00
msvalidate.019802F04AC0DBFA09E639BA8F2E349685
google-site-verificationQMu0ODkER3rN5hLcMLqNVf7e3bkjYsNLTuhqfH48jCA
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MobileOptimizedwidth
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viewportwidth=device-width, initial-scale=1.0
nist_search_modified2025-05-20T10:02:00-04:00
nist_search_bundlehomepage
langen
twitter:cardsummary_large_image
twitter:descriptionNIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life
twitter:siteNIST
twitter:titleNational Institute of Standards and Technology
twitter:imagehttps://www.nist.gov/themes/custom/nist_www/img/homepage/nist_mark.png
twitter:image:altNIST Logo
og:site_nameNIST
og:typewebsite
og:urlhttps://www.nist.gov/
og:titleNational Institute of Standards and Technology
og:descriptionNIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life
og:imagehttps://www.nist.gov/themes/custom/nist_www/img/homepage/nist_mark.png
og:image:width2048
og:image:height1152
og:image:altNIST Logo
charsetutf-8

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Calidad de la página

Contenido
(Extremadamente importante)
El número total de palabras en la página es bueno: 662 palabras.
Un 23% del contenido está constituido por palabras vacías.
Las palabras clave del título también se repiten en el texto del cuerpo.
La página contiene un listado, lo que indica una buena estructuración del contenido.
Se han encontrado 6 párrafos en esta página.
El contenido en formato texto de esta página es óptimo.
No se detecta ningún placeholder de texto ni imagen.
No se detecta contenido duplicado.
La cantidad media de palabras por frase es buena: 10.63 palabras.
Frames
(Extremadamente importante)
Esta página no utiliza ningún frameset.
Optimización para móviles
(Poco importante)
No se ha especificado ningún icono de Apple Touch.
El valor de la etiqueta viewport es correcto: (width=device-width, initial-scale=1.0).
Etiquetas Bold y Strong
(Poco importante)
El uso de etiquetas de negritas en esta página es óptimo. Te recomendamos emplear hasta 13 etiquetas de negritas en una página.
Optimización de imágenes
(Poco importante)
No se detecta ninguna descripción del atributo ALT en 2 imágenes. El contenido de los atributos ALT también es evaluado como texto por los buscadores y es muy importante para la búsqueda de imágenes.
Redes Sociales
(Deseable)
Esta página está perfectamente optimizada para las redes sociales.
Etiquetas markup adicionales
(Deseable)
No se detecta ninguna etiqueta markup (de Schema.org) adicional.
HTTPS
(Poco importante)
El sitio utiliza HTTPS para transferir datos de forma segura.
Todos los archivos incluidos se transfieren a través de HTTPS.

Lista de medios

URLAtributo ALTTítulo
...onent-library/dist/img/us_flag_small.pngU.S. flag
...ponent-library/dist/img/icon-dot-gov.svgCarece de atributo ALT
...omponent-library/dist/img/icon-https.svgCarece de atributo ALT
...ry/dist/img/logo/nist_logo_sidestack.svgNational Institute of Standards and Technology
.../dist/img/logo/NIST-Logo-Brand-White.svgNational Institute of Standards and Technology
.../dist/img/usa-icons-bg/search--white.svgSearch
..._www/img/homepage/chips_logo_mark.png?v1CHIPS.gov logo
...9-11/afrc2019-0270-409.jpg?itok=wUnF_KZQER-2 taking off
..._1508063468.jpg?h=8c1344d8&itok=l7b30K-JA researcher wearing a mask, safety glasses and gloves sits at a desk, looking at electronic devices and writing on a clipboard.
..._2307333735.jpg?h=31a74ad5&itok=UFiGboXjIllustration with icons including keys, atoms, padlocks and lines of computer code.
...enShots_013.jpg?h=8f74817f&itok=sg3CV04cTwo researchers in safety glasses stand behind a table holding various electronic and laser devices. A metal structure in the foreground is part of the atomic clock.
...ork-final_0.png?h=3c1ea6a7&itok=hvFdTrzRPrivacy Framework wheel includes central Govern circle and four outer sections: Control, Communicate, Protect, Identify.
... (28 of 38).jpg?h=925088a3&itok=LYOTbOmoHorizontal concrete slab is visible in a forest of scaffolding and equipment in a large indoor space.
...trons-final.png?h=499985db&itok=Z-koVQX6When an ordinary beam of neutrons strikes the team’s silicon grating, the millions of scored lines on the grating convert the neutrons into an Airy beam, whose wavefront travels along a parabolic path. The triangular shapes on the detector match the predicted behavior of an Airy beam, offering evidence of the team’s success.
...tal_defects.jpg?h=0de8f26b&itok=Cjk2_IXiA black and white image of the aluminum alloy under a microscope. Most of the image is light grey, but there are many small black spots that have lines extending out from them like cracks.
...g/homepage/wattbalance_1600_x_800.jpg?v1Photograph of the NIST-4 Kibble watt balance in blue light.
...age/nist_gaithersburg_campus_2400.jpg?v1Photograph of the NIST Gaithersburg Campus
.../dist/img/logo/NIST-Logo-Brand-White.svgNational Institute of Standards and Technology logo

Estructura de la página

Encabezado H1
(Extremadamente importante)
No se ha detectado ningún encabezado H1.
Encabezados
(Importante)
En la estructura de los encabezados H faltan uno o varios niveles.

Estructura de los encabezados

Jerarquía de encabezadosContenido
H2 Driving Innovation
H2 What we do
H2 CHIPS for America
H2 NIST in your State
H2 What’s new
H2 America’s national measurement institute
H2 NIST in your inbox
H3 NIST Moonlight Data Will Help Satellites Get a More Accurate Look at Earth
H3 Research-Based Practices Can Help Forensic Scientists Do Their Best Work
H3 What Is Quantum Cryptography?
H3 New Atomic Fountain Clock Joins Elite Group That Keeps the World on Time
H3 NIST Updates Privacy Framework, Tying It to Recent Cybersecurity Guidelines
H3 Champlain Towers South Investigation Team Provides Update to Structural Engineers
H3 NIST’s Curved Neutron Beams Could Deliver Benefits Straight to Industry
H3 Rare Crystal Shape Found to Increase the Strength of 3D-Printed Metal
H3 HEADQUARTERS
Algunos textos ancla son demasiado largos.
Algunos textos ancla se repiten más de una vez en varios enlaces.
La cantidad de enlaces internos es adecuada.
Ningún enlace interno contiene parámetros dinámicos.
Hay 19 enlaces externos en esta página.

Enlaces detectados en esta página

EnlacePropiedadesTexto ancla
https://www.nist.gov/Texto ancla Skip to main content
https://www.nist.gov/IMG-ALT National Institute of Standards and Technology
A-TITLE National Institute of Standards and Technology
https://www.nist.gov/careersCareers
https://shop.nist.gov/Externo Subdominio Shop
/about-nist/contact-usContact
https://www.nist.gov/publicationsPublications
https://www.nist.gov/topicsAll Topics
/advanced-communicationsAdvanced communications
/artificial-intelligenceArtificial intelligence
https://www.nist.gov/bioscienceBioscience
/buildings-constructionBuildings and construction
https://www.nist.gov/chemistryChemistry
/cybersecurityCybersecurity
https://www.nist.gov/electronicsElectronics
https://www.nist.gov/energyEnergy
https://www.nist.gov/environmentEnvironment
https://www.nist.gov/fireFire
/forensic-scienceForensic science
https://www.nist.gov/healthHealth
/information-technologyInformation technology
/infrastructureInfrastructure
/manufacturingManufacturing
https://www.nist.gov/materialsMaterials
/mathematics-statisticsMathematics and statistics
https://www.nist.gov/metrologyMetrology
/nanotechnologyNanotechnology
/neutron-researchNeutron research
/performance-excellencePerformance excellence
https://www.nist.gov/physicsPhysics
/public-safetyPublic safety
/quantum-information-scienceQuantum information science
https://www.nist.gov/resilienceResilience
https://www.nist.gov/standardsStandards
/transportationTransportation
https://www.nist.gov/adlpAssoc Director of Laboratory Programs
https://www.nist.gov/laboratoriesLaboratories
https://www.nist.gov/ctlCommunications Technology Laboratory
https://www.nist.gov/elEngineering Laboratory
https://www.nist.gov/itlInformation Technology Laboratory
https://www.nist.gov/mmlMaterial Measurement Laboratory
https://www.nist.gov/pmlPhysical Measurement Laboratory
/user-facilitiesUser Facilities
https://www.nist.gov/ncnrNIST Center for Neutron Research
https://www.nist.gov/cnstCNST NanoFab
/research-test-bedsResearch Test Beds
/laboratories/projects-programsResearch Projects
/laboratories/tools-instrumentsTools & Instruments
/major-programsMajor Programs
https://www.nist.gov/baldrigeBaldrige Performance Excellence Program
https://www.nist.gov/chipsCHIPS for America Initiative
https://www.nist.gov/mepManufacturing Extension Partnership (MEP)
https://www.nist.gov/oamOffice of Advanced Manufacturing
https://www.nist.gov/spoSpecial Programs Office
https://www.nist.gov/tpoTechnology Partnerships Office
/standards-measurementsMeasurements and Standards
https://www.nist.gov/calibrationsCalibration Services
https://www.nist.gov/nvlapLaboratory Accreditation (NVLAP)
/nist-quality-systemQuality System
https://www.nist.gov/srmStandard Reference Materials (SRMs)
https://www.nist.gov/sriStandard Reference Instruments (SRIs)
https://www.nist.gov/standardsgovStandards.gov
/pml/time-and-frequency-divisi...Time Services
https://www.nist.gov/pml/owmOffice of Weights and Measures
/services-resources/softwareSoftware
https://www.nist.gov/dataData
https://webbook.nist.gov/chemi...Externo Subdominio Chemistry WebBook
https://nvd.nist.gov/Externo Subdominio National Vulnerability Database
/pml/productsservices/physical...Physical Reference Data
https://www.nist.gov/srdStandard Reference Data (SRD)
https://shop.nist.gov/Externo Subdominio Storefront
https://www.nist.gov/tpoLicense & Patents
https://csrc.nist.gov/Externo Subdominio Computer Security Resource Center (CSRC)
/nist-research-libraryNIST Research Library
/news-events/newsNews
/news-events/eventsEvents
https://www.nist.gov/blogsBlogs
/feature-storiesFeature Stories
https://www.nist.gov/awardsAwards
/video-galleryVideo Gallery
/image-galleryImage Gallery
/pao/media-contactsMedia Contacts
https://www.nist.gov/about-nistAbout Us
/director/leadershipLeadership
/director/nist-organization-st...Organization Structure
/about-nist/budget-planningBudget & Planning
/about-nist/contact-usContact Us
/about-nist/visitVisit
https://www.nist.gov/careersTexto duplicado Careers
/iaao/academic-affairs-officeStudent programs
/about-nist/work-nistWork with NIST
https://www.nist.gov/historyHistory
http://nistdigitalarchives.con...Externo Subdominio NIST Digital Archives
https://www.nist.gov/nist-museumNIST Museum
/nist-and-nobelNIST and the Nobel
https://www.nist.gov/educationEducational Resources
/artificial-intelligenceArtificial Intelligence
https://www.nist.gov/bioscienceTexto duplicado Bioscience
/cybersecurityTexto duplicado Cybersecurity
https://www.nist.gov/energyTexto duplicado Energy
/manufacturingTexto duplicado Manufacturing
/advanced-communicationsNext-Gen Communications
/quantum-information-scienceQuantum Science
https://www.nist.gov/standardsTexto duplicado Standards
https://www.nist.gov/topicsSee more topics
https://www.nist.gov/chipsCHIPS for America
A-TITLE Learn more at chips.gov
https://www.nist.gov/chipsIMG-ALT CHIPS.gov logo
A-TITLE Learn more at chips.gov
https://www.nist.gov/chipsLearn more
A-TITLE Learn more at chips.gov
https://www.nist.gov/statesNIST in your State
https://www.nist.gov/statesTexto duplicado Learn more
/news-events/news/2025/05/nist...NIST Moonlight Data Will Help Satellites Get a More Accurate Look at Earth
IMG-ALT ER-2 taking off
A-TITLE Go to NIST Moonlight Data Will Help Satellites Get a More Accurate Look at Earth
/blogs/taking-measure/research...Research-Based Practices Can Help Forensic Scientists Do Their Best Work
IMG-ALT A researcher wearing a mask, safety glasses and gloves sits at a desk, looking at electronic devices and writing on a clipboard.
A-TITLE Go to Research-Based Practices Can Help Forensic Scientists Do Their Best Work
/cybersecurity/what-quantum-cr...What Is Quantum Cryptography?
IMG-ALT Illustration with icons including keys, atoms, padlocks and lines of computer code.
A-TITLE Go to What Is Quantum Cryptography?
/news-events/news/2025/04/new-...New Atomic Fountain Clock Joins Elite Group That Keeps the World on Time
IMG-ALT Two researchers in safety glasses stand behind a table holding various electronic and laser devices. A metal structure in the foreground is part of the atomi...
A-TITLE Go to New Atomic Fountain Clock Joins Elite Group That Keeps the World on Time
/news-events/news/2025/04/nist...IMG-ALT Privacy Framework wheel includes central Govern circle and four outer sections: Control, Communicate, Protect, Identify.
/news-events/news/2025/04/nist...NIST Updates Privacy Framework, Tying It to Recent Cybersecurity Guidelines
/news-events/news/2025/04/cham...IMG-ALT Horizontal concrete slab is visible in a forest of scaffolding and equipment in a large indoor space.
/news-events/news/2025/04/cham...Champlain Towers South Investigation Team Provides Update to Structural Engineers
/news-events/news/2025/04/nist...IMG-ALT When an ordinary beam of neutrons strikes the team’s silicon grating, the millions of scored lines on the grating convert the neutrons into an Airy beam, who...
/news-events/news/2025/04/nist...NIST’s Curved Neutron Beams Could Deliver Benefits Straight to Industry
/news-events/news/2025/04/rare...IMG-ALT A black and white image of the aluminum alloy under a microscope. Most of the image is light grey, but there are many small black spots that have lines exten...
/news-events/news/2025/04/rare...Rare Crystal Shape Found to Increase the Strength of 3D-Printed Metal
/news-events/newsSee NIST News
https://www.nist.gov/nmiFAQ
/services-resources/standards-...Standards and Measurements
https://www.nist.gov/nist-workHow NIST’s Measurements Work for You
https://public.govdelivery.com...Externo Subdominio Sign Up
https://www.nist.gov/IMG-ALT National Institute of Standards and Technology logo
A-TITLE National Institute of Standards and Technology
/cdn-cgi/l/email-protectionWebmaster
/about-nist/contact-usSubdominio Texto duplicado Contact Us
https://www.nist.gov/visitSubdominio Our Other Offices
https://x.com/NISTExterno X.com
https://www.facebook.com/NISTExterno Subdominio Facebook
https://www.linkedin.com/compa...Externo Subdominio LinkedIn
https://www.instagram.com/nist/Externo Subdominio Instagram
https://www.youtube.com/NISTExterno Subdominio YouTube
https://giphy.com/nistExterno Giphy
/news-events/nist-rss-feedsSubdominio RSS Feed
https://public.govdelivery.com...Externo Subdominio Mailing List
/form/nist-gov-feedback?destin...Nofollow Feedback
A-TITLE Provide feedback
/privacy-policySubdominio Site Privacy
/oism/accessibilitySubdominio Accessibility
https://www.nist.gov/privacySubdominio Privacy Program
/oism/copyrightsSubdominio Copyrights
https://www.commerce.gov/vulne...Externo Subdominio Vulnerability Disclosure
/no-fear-act-policySubdominio No Fear Act Policy
/office-director/freedom-infor...Subdominio FOIA
/environmental-policy-statementSubdominio Environmental Policy
/summary-report-scientific-int...Subdominio Scientific Integrity
/nist-information-quality-stan...Subdominio Information Quality Standards
https://www.commerce.gov/Externo Subdominio Commerce.gov
http://www.science.gov/Externo Subdominio Science.gov
http://www.usa.gov/Externo Subdominio USA.gov
https://vote.gov/Externo Vote.gov

Configuración del servidor

Redirecciones HTTP
(Extremadamente importante)
Esta página redirige a "https://www.nist.gov/".
Cabecera HTTP
(Importante)
La cabecera X-Powered-by no se envía en la cabecera de la página.
El servidor web transmite la página web (HTML) comprimida.
Rendimiento
(Poco importante)
Con 1,11 segundos, el tiempo de respuesta de la página es superior al límite recomendado de 0,4 segundos. Un tiempo de respuesta elevado ralentiza innecesariamente el rastreo de los buscadores y propicia una mala experiencia de uso.
El tamaño HTML de la página es adecuado: 88 kB.

Cabecera HTTP

NombreValor
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content-typetext/html; charset=UTF-8
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expiresSun, 19 Nov 1978 05:00:00 GMT
last-modifiedTue, 20 May 2025 14:03:02 GMT
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varyCookie,Accept-Encoding
viavarnish
x-ah-environmentprod
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x-cache-hits14412
x-content-type-optionsnosniff
x-drupal-cacheHIT
x-frame-optionsSAMEORIGIN
x-generatorDrupal 10 (https://www.drupal.org)
x-request-idv-2585d656-3583-11f0-885c-4f396d75c16d
cf-cache-statusDYNAMIC
set-cookie274 Caracteres
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Factores externos

Wikipedia enlaza esta página en sus fuentes.
Esta página recibe enlaces de calidad de otros sitios web.
Esta página recibe backlinks de 12.722 dominios de referencia.
Esta página recibe un total de 695.196 backlinks.
Esta página recibe backlinks de 7.664 direcciones IP distintas.

Backlinks desde Wikipedia

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Robots.txt

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# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.md
Disallow: /composer/Metapackage/README.txt
Disallow: /composer/Plugin/ProjectMessage/README.md
Disallow: /composer/Plugin/Scaffold/README.md
Disallow: /composer/Plugin/VendorHardening/README.txt
Disallow: /composer/Template/README.txt
Disallow: /modules/README.txt
Disallow: /sites/README.txt
Disallow: /themes/README.txt
Disallow: /web.config
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register
Disallow: /user/password
Disallow: /user/login
Disallow: /user/logout
Disallow: /media/oembed
Disallow: /*/media/oembed
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/user/password
Disallow: /index.php/user/register
Disallow: /index.php/user/login
Disallow: /index.php/user/logout
Disallow: /index.php/media/oembed
Disallow: /index.php/*/media/oembed

# Noindex files
Disallow: /system/files/documents/noindex/
Disallow: /index.php/system/files/documents/noindex/

# Search
Disallow: /fusion-search
Disallow: /index.php/fusion-search
Disallow: /site-search
Disallow: /index.php/site-search
Disallow: /search
Disallow: /index.php/search

# Disallow facet links
Disallow: *?f%5B*
Disallow: *&f%5B*

# Sitemap
Sitemap: https://www.nist.gov/sitemap.xml

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www.nist.gov
National Institute of Standards and Technology
NIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life

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