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<div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62830074ebb030486d8602f8/bg1.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x1 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0">Designing the User Interface: </div><div class="t m0 x2 h3 y3 ff1 fs0 fc0 sc0 ls0 ws0">Strategies for Effective Human-Computer Interaction </div><div class="t m0 x3 h4 y4 ff1 fs1 fc0 sc0 ls0 ws0"> </div><div class="t m0 x4 h5 y5 ff1 fs2 fc0 sc0 ls0 ws0">Fifth Edition<span class="ff2 fc1"> </span></div><div class="t m0 x5 h6 y6 ff2 fs1 fc1 sc0 ls0 ws0"> </div><div class="t m0 x6 h4 y7 ff3 fs1 fc1 sc0 ls0 ws0">Ben Shneiderman & Catherine Plaisant </div><div class="t m0 x7 h4 y8 ff1 fs3 fc1 sc0 ls0 ws0">in collaboration with<span class="ff3 fs1"> </span></div><div class="t m0 x8 h4 y9 ff3 fs1 fc1 sc0 ls0 ws0">Maxine S. Cohen and Steven M. Jacobs </div><div class="t m0 x9 h7 ya ff4 fs4 fc2 sc0 ls0 ws0">CHAPTER 8: </div><div class="t m0 xa h7 yb ff3 fs4 fc2 sc0 ls0 ws0">Interaction Devices </div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
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<div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62830074ebb030486d8602f8/bg2.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 xb h8 yc ff5 fs5 fc1 sc0 ls0 ws0">1-2<span class="_ _0"></span> </div><div class="t m0 xc h9 yd ff4 fs6 fc2 sc0 ls0 ws0">Keyboard Layouts </div><div class="t m0 xc ha ye ff6 fs7 fc2 sc0 ls0 ws0">•<span class="ff7"> <span class="_ _1"> </span><span class="ff4 fc0">QWERTY layout </span></span></div><div class="t m0 xd hb yf ff5 fs3 fc2 sc0 ls0 ws0">–<span class="ff7"> <span class="_ _2"> </span></span><span class="fc0">1870 Christopher Latham Sholes </span></div><div class="t m0 xd hb y10 ff5 fs3 fc2 sc0 ls0 ws0">–<span class="ff7"> <span class="_ _2"> </span></span><span class="fc0">good mechanical design and a clever placement of the letters that</span></div><div class="t m0 xe hb y11 ff5 fs3 fc0 sc0 ls0 ws0"> slowed down the users enough that key jamming was infrequent </div><div class="t m0 xd hb y12 ff5 fs3 fc2 sc0 ls0 ws0">–<span class="ff7"> <span class="_ _2"> </span></span><span class="fc0">put frequently used letter pairs far apart, thereby increasing finger travel</span></div><div class="t m0 xe hb y13 ff5 fs3 fc0 sc0 ls0 ws0"> distances </div><div class="t m0 xc hc y14 ff5 fs7 fc0 sc0 ls0 ws0"> </div><div class="t m0 xf hd y15 ff5 fs8 fc0 sc0 ls0 ws0">8-2<span class="_ _3"></span> </div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
<div id="pf3" class="pf w0 h0" data-page-no="3"><div class="pc pc3 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62830074ebb030486d8602f8/bg3.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 xb h8 yc ff5 fs5 fc1 sc0 ls0 ws0">1-3<span class="_ _0"></span> </div><div class="t m0 xc h9 yd ff4 fs6 fc2 sc0 ls0 ws0">Keyboard Layouts </div><div class="t m0 xf hd y15 ff5 fs8 fc0 sc0 ls0 ws0">8-3<span class="_ _3"></span> </div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
<div id="pf4" class="pf w0 h0" data-page-no="4"><div class="pc pc4 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62830074ebb030486d8602f8/bg4.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 xb h8 yc ff5 fs5 fc1 sc0 ls0 ws0">1-4<span class="_ _0"></span> </div><div class="t m0 xc he y16 ff4 fs9 fc2 sc0 ls0 ws0">Keyboard Layouts(cont.) <span class="ff8 sc1"></span></div><div class="t m0 xc ha y17 ff6 fs7 fc2 sc0 ls0 ws0">•<span class="ff7"> <span class="_ _1"> </span><span class="ff4 fc0">AZERTY layout </span></span></div><div class="t m0 xf hd y15 ff5 fs8 fc0 sc0 ls0 ws0">8-4<span class="_ _3"></span> </div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
<div id="pf5" class="pf w0 h0" data-page-no="5"><div class="pc pc5 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62830074ebb030486d8602f8/bg5.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 xb h8 yc ff5 fs5 fc1 sc0 ls0 ws0">1-5<span class="_ _0"></span> </div><div class="t m0 xc he y16 ff4 fs9 fc2 sc0 ls0 ws0">Keyboard Layouts(cont.) <span class="ff8 sc1"></span></div><div class="t m0 xc ha ye ff6 fs7 fc2 sc0 ls0 ws0">•<span class="ff7"> <span class="_ _1"> </span><span class="ff4 fc0">Dvorak layout </span></span></div><div class="t m0 xd hb yf ff5 fs3 fc2 sc0 ls0 ws0">–<span class="ff7"> <span class="_ _2"> </span></span><span class="fc0 ls1">1920 </span></div><div class="t m0 xd hb y10 ff5 fs3 fc2 sc0 ls0 ws0">–<span class="ff7"> <span class="_ _2"> </span></span><span class="fc0">reduces finger travel distances by at least one order of magnitude </span></div><div class="t m0 xd hb y18 ff5 fs3 fc2 sc0 ls0 ws0">–<span class="ff7"> <span class="_ _2"> </span></span><span class="fc0">Acceptance has been slow despite the dedicated efforts of some</span></div><div class="t m0 xe hb y19 ff5 fs3 fc0 sc0 ls0 ws0"> devotees </div><div class="t m0 xd hb y1a ff5 fs3 fc2 sc0 ls0 ws0">–<span class="ff7"> <span class="_ _2"> </span></span><span class="fc0">it takes about 1 week of regular typing to make the switch, but most</span></div><div class="t m0 xe hb y1b ff5 fs3 fc0 sc0 ls0 ws0"> users have been unwilling to invest the effort <span class="fsa"> </span></div><div class="t m0 xf hd y15 ff5 fs8 fc0 sc0 ls0 ws0">8-5<span class="_ _3"></span> </div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>