SlideShare a Scribd company logo
1 of 65
Download to read offline
Don’t make me think
Erlend Debast
Web designer at Proximity BBDO

erlend.debast@proximity.bbdo.be
twitter.com/erlend
artueel.be
Us•a•bil•i•ty
“... is the effectiveness, efficiency,
and satisfaction with which users
can achieve tasks in a particular
environment of a product.”
Bringing ease, joy
and fun to the
people around us.
Usability is
Anger Management
Internet has become part of our daily lives.
Yet, with very poor usability.
4 common situations
    & solutions
5 actually


             4 common situations
                 & solutions
1 Where the hell am I
Site logo
★   Is expected “top-left”
★   Clickable, back to home
Near-perfect
Goes back to
home or news?
“Home”
★   Is expected
★   First item in main navigation
★   English terminology is accepted
Home is
 first &
selected
First item &
  selected
Main Navigation
★   Is expected (horizontal)
★   Limit the number of items
★   “Selected” status
Simple &
straightforward
Lovely icons




                Clearly
               selected
Sub Navigation
★   Is expected (vertically)
★   Close to main navigation
★   Selected status
Close to
main nav
           clearly selected
Breadcrumbs
★   Indicates “traveled” path
★   Show site/content hierarchy
★   Alternative way of going “back”
Shows
traveled path
Plain
& Simple
Language
★   Expected near main navigation
★   ISO Standards (NL-FR-EN)
★   Indicate current language
Top right
& selected
top right, but
 not selected
2 I can’t find what I’m
  looking for...
Typography
★   Difference between titles & paragraphs
★   Links should look like links
★   Use colors & fonts to show importance
Titles orange




                               links in blue
Price in red



                                       Meta
                                   information
                                      in grey
Sans-font

             Clear CTA



italic for
  quotes
Copywriting
★   Use keywords for titles (Google loves that too)
★   Match navigation & page titles
★   Avoid duplicate content
★   Group your content, wisely
Keywords as
 navigation




  Selected
Whitespace
★   Use whitespace to create structure
★   More screensize doesn’t mean more content
★   Whitespace is sexy
Search box
★   Expected top-right
★   Average search query is 35 chars
Top right as
 exptected
Close the
navigation
3 What’s next please?
Forms
★   Default OS design is expected
★   Different length for each input format
★   Pre-format input fields/data
Where is
 home?

           This ain’t
            default
this field is
  needed




   Length that
  matches input
Error recovery
★   Show what the user did wrong
★   Indicate how they can fix the mistake
★   Stop punishing your users
★   Use inline errors with care
Inline
errors




         Default
         design
Interactive
                 inline error

                                Obvious
 Red color to                    CTA
indicate error
Progress
★   Show a process indicator
★   People love making progress
★   Group your information (obvious vs personal)
3 clear steps

                Selected



                       Default
                       design




                                What
                           happens with my
                                info?
4 Where should I click?
Call to action’s
★   People should know how to join
★   People should know why to join
★   Consistent style for your CTA’s
Consistent
  style
Consistent
  style
Consistent
                      style



Color usage baby!
5 The ever-lasting
  “above the fold”
  discussion
Life below the fold
★   People scroll, yes they do
★   Your lay-out should look “cut”
★   Make your footer usable
37signals
Search as backup




         Contact us
        information
Functional sitemap




                     Switch language
product Line up
Get to know your
    audience
It takes between 2 & 5 people to fix
70% of the most common usability issues.
Share your site statistics with all the
people involved. Not only with marketing.
A usable website can result in higher ROI
Everyone’s happy!
Erlend Debast
Web designer at Proximity BBDO

erlend.debast@proximity.bbdo.be
twitter.com/erlend
artueel.be

More Related Content

Viewers also liked

Responsive Web Design & Workflows for Todays Web (THE UX-MEN at The Hive, Hon...
Responsive Web Design & Workflows for Todays Web (THE UX-MEN at The Hive, Hon...Responsive Web Design & Workflows for Todays Web (THE UX-MEN at The Hive, Hon...
Responsive Web Design & Workflows for Todays Web (THE UX-MEN at The Hive, Hon...Holger Bartel
 
The Ultimate Guide to Font Pairing
The Ultimate Guide to Font PairingThe Ultimate Guide to Font Pairing
The Ultimate Guide to Font PairingGuy Kawasaki
 
Wireframes for WordPress
Wireframes for WordPressWireframes for WordPress
Wireframes for WordPressJohn Housholder
 
Typography in Web Design (WordCamp Toronto 2014)
Typography in Web Design (WordCamp Toronto 2014)Typography in Web Design (WordCamp Toronto 2014)
Typography in Web Design (WordCamp Toronto 2014)Jasmine Vesque
 
Designing for a Better User Experience
Designing for a Better User ExperienceDesigning for a Better User Experience
Designing for a Better User ExperienceBuiltByHQ
 

Viewers also liked (6)

Responsive Web Design & Workflows for Todays Web (THE UX-MEN at The Hive, Hon...
Responsive Web Design & Workflows for Todays Web (THE UX-MEN at The Hive, Hon...Responsive Web Design & Workflows for Todays Web (THE UX-MEN at The Hive, Hon...
Responsive Web Design & Workflows for Todays Web (THE UX-MEN at The Hive, Hon...
 
The Ultimate Guide to Font Pairing
The Ultimate Guide to Font PairingThe Ultimate Guide to Font Pairing
The Ultimate Guide to Font Pairing
 
Wireframes for WordPress
Wireframes for WordPressWireframes for WordPress
Wireframes for WordPress
 
Typography in Web Design (WordCamp Toronto 2014)
Typography in Web Design (WordCamp Toronto 2014)Typography in Web Design (WordCamp Toronto 2014)
Typography in Web Design (WordCamp Toronto 2014)
 
Designing for a Better User Experience
Designing for a Better User ExperienceDesigning for a Better User Experience
Designing for a Better User Experience
 
Up to Speed on HTML 5 and CSS 3
Up to Speed on HTML 5 and CSS 3Up to Speed on HTML 5 and CSS 3
Up to Speed on HTML 5 and CSS 3
 

Similar to An introduction to Usability

Website Architecture Presentation from Web Strategy Workshops
Website Architecture Presentation from Web Strategy WorkshopsWebsite Architecture Presentation from Web Strategy Workshops
Website Architecture Presentation from Web Strategy WorkshopsCharles Edmunds
 
International seo and content clustering
International seo and content clusteringInternational seo and content clustering
International seo and content clusteringEnterprise Ireland
 
International seo and content clustering | John Caldwell | CreatorSEO
International seo and content clustering | John Caldwell | CreatorSEOInternational seo and content clustering | John Caldwell | CreatorSEO
International seo and content clustering | John Caldwell | CreatorSEOEnterprise Ireland
 
International Seo and Content Clustering
International Seo and Content ClusteringInternational Seo and Content Clustering
International Seo and Content ClusteringEoin O Siochru
 
Building a Powerful Small Business Website
Building a Powerful Small Business WebsiteBuilding a Powerful Small Business Website
Building a Powerful Small Business WebsiteReal Time Web Marketing
 
Enterprise Ireland presentation - International seo and content June 2018
Enterprise Ireland  presentation - International seo and content   June 2018Enterprise Ireland  presentation - International seo and content   June 2018
Enterprise Ireland presentation - International seo and content June 2018John Caldwell
 
Going Global Without Going Insane
Going Global Without Going InsaneGoing Global Without Going Insane
Going Global Without Going InsaneKevin Potts
 
Adobe AEM - Global SEO
Adobe AEM - Global SEOAdobe AEM - Global SEO
Adobe AEM - Global SEOEli Schwartz
 
BcnDevCon13 - No Designer? No Problem!
BcnDevCon13 - No Designer? No Problem!BcnDevCon13 - No Designer? No Problem!
BcnDevCon13 - No Designer? No Problem!Edin Kapic
 
International SEO and Content Silos | John Caldwell | CreatorSEO
International SEO and Content Silos | John Caldwell | CreatorSEOInternational SEO and Content Silos | John Caldwell | CreatorSEO
International SEO and Content Silos | John Caldwell | CreatorSEOEnterprise Ireland
 
nternational SEO and Content Clustering | John Caldwell | CreatorSEO / ABC Di...
nternational SEO and Content Clustering | John Caldwell | CreatorSEO / ABC Di...nternational SEO and Content Clustering | John Caldwell | CreatorSEO / ABC Di...
nternational SEO and Content Clustering | John Caldwell | CreatorSEO / ABC Di...Enterprise Ireland
 
SEO + UX + CRO : les bonnes pratiques de 2022
SEO + UX + CRO : les bonnes pratiques de 2022SEO + UX + CRO : les bonnes pratiques de 2022
SEO + UX + CRO : les bonnes pratiques de 2022Semrush France
 
International Search Engine Optimisation - SEO
International Search Engine Optimisation - SEOInternational Search Engine Optimisation - SEO
International Search Engine Optimisation - SEOEnterprise Ireland
 
International SEO | John Caldwell | CreatorSEO
International SEO | John Caldwell | CreatorSEOInternational SEO | John Caldwell | CreatorSEO
International SEO | John Caldwell | CreatorSEOEnterprise Ireland
 
Your website roadmap
Your website roadmapYour website roadmap
Your website roadmapRaaker
 
Becoming a-filemaker-designer-in-60-minutes
Becoming a-filemaker-designer-in-60-minutesBecoming a-filemaker-designer-in-60-minutes
Becoming a-filemaker-designer-in-60-minutesDB Services
 
Creating a World-class Translation Strategy
Creating a World-class Translation StrategyCreating a World-class Translation Strategy
Creating a World-class Translation StrategyJose Palomares
 
International SEO and Content Silos | John Caldwell | CreatorSEO
International SEO and Content Silos | John Caldwell | CreatorSEOInternational SEO and Content Silos | John Caldwell | CreatorSEO
International SEO and Content Silos | John Caldwell | CreatorSEOEnterprise Ireland
 

Similar to An introduction to Usability (20)

Website Architecture Presentation from Web Strategy Workshops
Website Architecture Presentation from Web Strategy WorkshopsWebsite Architecture Presentation from Web Strategy Workshops
Website Architecture Presentation from Web Strategy Workshops
 
Digital Accessibility
Digital AccessibilityDigital Accessibility
Digital Accessibility
 
International seo and content clustering
International seo and content clusteringInternational seo and content clustering
International seo and content clustering
 
International seo and content clustering | John Caldwell | CreatorSEO
International seo and content clustering | John Caldwell | CreatorSEOInternational seo and content clustering | John Caldwell | CreatorSEO
International seo and content clustering | John Caldwell | CreatorSEO
 
International Seo and Content Clustering
International Seo and Content ClusteringInternational Seo and Content Clustering
International Seo and Content Clustering
 
Building a Powerful Small Business Website
Building a Powerful Small Business WebsiteBuilding a Powerful Small Business Website
Building a Powerful Small Business Website
 
Enterprise Ireland presentation - International seo and content June 2018
Enterprise Ireland  presentation - International seo and content   June 2018Enterprise Ireland  presentation - International seo and content   June 2018
Enterprise Ireland presentation - International seo and content June 2018
 
Going Global Without Going Insane
Going Global Without Going InsaneGoing Global Without Going Insane
Going Global Without Going Insane
 
Adobe AEM - Global SEO
Adobe AEM - Global SEOAdobe AEM - Global SEO
Adobe AEM - Global SEO
 
BcnDevCon13 - No Designer? No Problem!
BcnDevCon13 - No Designer? No Problem!BcnDevCon13 - No Designer? No Problem!
BcnDevCon13 - No Designer? No Problem!
 
International SEO and Content Silos | John Caldwell | CreatorSEO
International SEO and Content Silos | John Caldwell | CreatorSEOInternational SEO and Content Silos | John Caldwell | CreatorSEO
International SEO and Content Silos | John Caldwell | CreatorSEO
 
nternational SEO and Content Clustering | John Caldwell | CreatorSEO / ABC Di...
nternational SEO and Content Clustering | John Caldwell | CreatorSEO / ABC Di...nternational SEO and Content Clustering | John Caldwell | CreatorSEO / ABC Di...
nternational SEO and Content Clustering | John Caldwell | CreatorSEO / ABC Di...
 
SEO + UX + CRO : les bonnes pratiques de 2022
SEO + UX + CRO : les bonnes pratiques de 2022SEO + UX + CRO : les bonnes pratiques de 2022
SEO + UX + CRO : les bonnes pratiques de 2022
 
International Search Engine Optimisation - SEO
International Search Engine Optimisation - SEOInternational Search Engine Optimisation - SEO
International Search Engine Optimisation - SEO
 
International SEO | John Caldwell | CreatorSEO
International SEO | John Caldwell | CreatorSEOInternational SEO | John Caldwell | CreatorSEO
International SEO | John Caldwell | CreatorSEO
 
Your website roadmap
Your website roadmapYour website roadmap
Your website roadmap
 
Becoming a-filemaker-designer-in-60-minutes
Becoming a-filemaker-designer-in-60-minutesBecoming a-filemaker-designer-in-60-minutes
Becoming a-filemaker-designer-in-60-minutes
 
J105 Web Design
J105 Web DesignJ105 Web Design
J105 Web Design
 
Creating a World-class Translation Strategy
Creating a World-class Translation StrategyCreating a World-class Translation Strategy
Creating a World-class Translation Strategy
 
International SEO and Content Silos | John Caldwell | CreatorSEO
International SEO and Content Silos | John Caldwell | CreatorSEOInternational SEO and Content Silos | John Caldwell | CreatorSEO
International SEO and Content Silos | John Caldwell | CreatorSEO
 

Recently uploaded

FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756
FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756
FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756dollysharma2066
 
call girls in Kaushambi (Ghaziabad) 🔝 >༒8448380779 🔝 genuine Escort Service 🔝...
call girls in Kaushambi (Ghaziabad) 🔝 >༒8448380779 🔝 genuine Escort Service 🔝...call girls in Kaushambi (Ghaziabad) 🔝 >༒8448380779 🔝 genuine Escort Service 🔝...
call girls in Kaushambi (Ghaziabad) 🔝 >༒8448380779 🔝 genuine Escort Service 🔝...Delhi Call girls
 
Case Study of Hotel Taj Vivanta, Pune
Case Study of Hotel Taj Vivanta, PuneCase Study of Hotel Taj Vivanta, Pune
Case Study of Hotel Taj Vivanta, PuneLukeKholes
 
Call Girls in Kalkaji Delhi 8264348440 call girls ❤️
Call Girls in Kalkaji Delhi 8264348440 call girls ❤️Call Girls in Kalkaji Delhi 8264348440 call girls ❤️
Call Girls in Kalkaji Delhi 8264348440 call girls ❤️soniya singh
 
Brookefield Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...
Brookefield Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...Brookefield Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...
Brookefield Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...amitlee9823
 
Government polytechnic college-1.pptxabcd
Government polytechnic college-1.pptxabcdGovernment polytechnic college-1.pptxabcd
Government polytechnic college-1.pptxabcdshivubhavv
 
The history of music videos a level presentation
The history of music videos a level presentationThe history of music videos a level presentation
The history of music videos a level presentationamedia6
 
Design Inspiration for College by Slidesgo.pptx
Design Inspiration for College by Slidesgo.pptxDesign Inspiration for College by Slidesgo.pptx
Design Inspiration for College by Slidesgo.pptxTusharBahuguna2
 
Best VIP Call Girls Noida Sector 47 Call Me: 8448380779
Best VIP Call Girls Noida Sector 47 Call Me: 8448380779Best VIP Call Girls Noida Sector 47 Call Me: 8448380779
Best VIP Call Girls Noida Sector 47 Call Me: 8448380779Delhi Call girls
 
💫✅jodhpur 24×7 BEST GENUINE PERSON LOW PRICE CALL GIRL SERVICE FULL SATISFACT...
💫✅jodhpur 24×7 BEST GENUINE PERSON LOW PRICE CALL GIRL SERVICE FULL SATISFACT...💫✅jodhpur 24×7 BEST GENUINE PERSON LOW PRICE CALL GIRL SERVICE FULL SATISFACT...
💫✅jodhpur 24×7 BEST GENUINE PERSON LOW PRICE CALL GIRL SERVICE FULL SATISFACT...sonalitrivedi431
 
Pastel Portfolio _ by Slidesgo.pptx. Xxx
Pastel Portfolio _ by Slidesgo.pptx. XxxPastel Portfolio _ by Slidesgo.pptx. Xxx
Pastel Portfolio _ by Slidesgo.pptx. XxxSegundoManuelFaichin1
 
VVIP Pune Call Girls Hadapsar (7001035870) Pune Escorts Nearby with Complete ...
VVIP Pune Call Girls Hadapsar (7001035870) Pune Escorts Nearby with Complete ...VVIP Pune Call Girls Hadapsar (7001035870) Pune Escorts Nearby with Complete ...
VVIP Pune Call Girls Hadapsar (7001035870) Pune Escorts Nearby with Complete ...Call Girls in Nagpur High Profile
 
Editorial design Magazine design project.pdf
Editorial design Magazine design project.pdfEditorial design Magazine design project.pdf
Editorial design Magazine design project.pdftbatkhuu1
 
infant assessment fdbbdbdddinal ppt.pptx
infant assessment fdbbdbdddinal ppt.pptxinfant assessment fdbbdbdddinal ppt.pptx
infant assessment fdbbdbdddinal ppt.pptxsuhanimunjal27
 
Peaches App development presentation deck
Peaches App development presentation deckPeaches App development presentation deck
Peaches App development presentation decktbatkhuu1
 
Top Rated Pune Call Girls Koregaon Park ⟟ 6297143586 ⟟ Call Me For Genuine S...
Top Rated  Pune Call Girls Koregaon Park ⟟ 6297143586 ⟟ Call Me For Genuine S...Top Rated  Pune Call Girls Koregaon Park ⟟ 6297143586 ⟟ Call Me For Genuine S...
Top Rated Pune Call Girls Koregaon Park ⟟ 6297143586 ⟟ Call Me For Genuine S...Call Girls in Nagpur High Profile
 
DragonBall PowerPoint Template for demo.pptx
DragonBall PowerPoint Template for demo.pptxDragonBall PowerPoint Template for demo.pptx
DragonBall PowerPoint Template for demo.pptxmirandajeremy200221
 
2-tool presenthdbdbdbdbddhdhddation.pptx
2-tool presenthdbdbdbdbddhdhddation.pptx2-tool presenthdbdbdbdbddhdhddation.pptx
2-tool presenthdbdbdbdbddhdhddation.pptxsuhanimunjal27
 

Recently uploaded (20)

FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756
FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756
FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756
 
call girls in Kaushambi (Ghaziabad) 🔝 >༒8448380779 🔝 genuine Escort Service 🔝...
call girls in Kaushambi (Ghaziabad) 🔝 >༒8448380779 🔝 genuine Escort Service 🔝...call girls in Kaushambi (Ghaziabad) 🔝 >༒8448380779 🔝 genuine Escort Service 🔝...
call girls in Kaushambi (Ghaziabad) 🔝 >༒8448380779 🔝 genuine Escort Service 🔝...
 
Case Study of Hotel Taj Vivanta, Pune
Case Study of Hotel Taj Vivanta, PuneCase Study of Hotel Taj Vivanta, Pune
Case Study of Hotel Taj Vivanta, Pune
 
Call Girls in Kalkaji Delhi 8264348440 call girls ❤️
Call Girls in Kalkaji Delhi 8264348440 call girls ❤️Call Girls in Kalkaji Delhi 8264348440 call girls ❤️
Call Girls in Kalkaji Delhi 8264348440 call girls ❤️
 
Brookefield Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...
Brookefield Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...Brookefield Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...
Brookefield Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...
 
Government polytechnic college-1.pptxabcd
Government polytechnic college-1.pptxabcdGovernment polytechnic college-1.pptxabcd
Government polytechnic college-1.pptxabcd
 
The history of music videos a level presentation
The history of music videos a level presentationThe history of music videos a level presentation
The history of music videos a level presentation
 
young call girls in Vivek Vihar🔝 9953056974 🔝 Delhi escort Service
young call girls in Vivek Vihar🔝 9953056974 🔝 Delhi escort Serviceyoung call girls in Vivek Vihar🔝 9953056974 🔝 Delhi escort Service
young call girls in Vivek Vihar🔝 9953056974 🔝 Delhi escort Service
 
B. Smith. (Architectural Portfolio.).pdf
B. Smith. (Architectural Portfolio.).pdfB. Smith. (Architectural Portfolio.).pdf
B. Smith. (Architectural Portfolio.).pdf
 
Design Inspiration for College by Slidesgo.pptx
Design Inspiration for College by Slidesgo.pptxDesign Inspiration for College by Slidesgo.pptx
Design Inspiration for College by Slidesgo.pptx
 
Best VIP Call Girls Noida Sector 47 Call Me: 8448380779
Best VIP Call Girls Noida Sector 47 Call Me: 8448380779Best VIP Call Girls Noida Sector 47 Call Me: 8448380779
Best VIP Call Girls Noida Sector 47 Call Me: 8448380779
 
💫✅jodhpur 24×7 BEST GENUINE PERSON LOW PRICE CALL GIRL SERVICE FULL SATISFACT...
💫✅jodhpur 24×7 BEST GENUINE PERSON LOW PRICE CALL GIRL SERVICE FULL SATISFACT...💫✅jodhpur 24×7 BEST GENUINE PERSON LOW PRICE CALL GIRL SERVICE FULL SATISFACT...
💫✅jodhpur 24×7 BEST GENUINE PERSON LOW PRICE CALL GIRL SERVICE FULL SATISFACT...
 
Pastel Portfolio _ by Slidesgo.pptx. Xxx
Pastel Portfolio _ by Slidesgo.pptx. XxxPastel Portfolio _ by Slidesgo.pptx. Xxx
Pastel Portfolio _ by Slidesgo.pptx. Xxx
 
VVIP Pune Call Girls Hadapsar (7001035870) Pune Escorts Nearby with Complete ...
VVIP Pune Call Girls Hadapsar (7001035870) Pune Escorts Nearby with Complete ...VVIP Pune Call Girls Hadapsar (7001035870) Pune Escorts Nearby with Complete ...
VVIP Pune Call Girls Hadapsar (7001035870) Pune Escorts Nearby with Complete ...
 
Editorial design Magazine design project.pdf
Editorial design Magazine design project.pdfEditorial design Magazine design project.pdf
Editorial design Magazine design project.pdf
 
infant assessment fdbbdbdddinal ppt.pptx
infant assessment fdbbdbdddinal ppt.pptxinfant assessment fdbbdbdddinal ppt.pptx
infant assessment fdbbdbdddinal ppt.pptx
 
Peaches App development presentation deck
Peaches App development presentation deckPeaches App development presentation deck
Peaches App development presentation deck
 
Top Rated Pune Call Girls Koregaon Park ⟟ 6297143586 ⟟ Call Me For Genuine S...
Top Rated  Pune Call Girls Koregaon Park ⟟ 6297143586 ⟟ Call Me For Genuine S...Top Rated  Pune Call Girls Koregaon Park ⟟ 6297143586 ⟟ Call Me For Genuine S...
Top Rated Pune Call Girls Koregaon Park ⟟ 6297143586 ⟟ Call Me For Genuine S...
 
DragonBall PowerPoint Template for demo.pptx
DragonBall PowerPoint Template for demo.pptxDragonBall PowerPoint Template for demo.pptx
DragonBall PowerPoint Template for demo.pptx
 
2-tool presenthdbdbdbdbddhdhddation.pptx
2-tool presenthdbdbdbdbddhdhddation.pptx2-tool presenthdbdbdbdbddhdhddation.pptx
2-tool presenthdbdbdbdbddhdhddation.pptx
 

An introduction to Usability