{"id":1223,"date":"2026-05-07T16:34:30","date_gmt":"2026-05-07T14:34:30","guid":{"rendered":"https:\/\/vtkkperinne.fi\/?p=1223"},"modified":"2026-05-07T16:34:31","modified_gmt":"2026-05-07T14:34:31","slug":"erkki-rajulin","status":"publish","type":"post","link":"https:\/\/vtkkperinne.fi\/?p=1223","title":{"rendered":"Erkki Rajulin"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><br>Erkki Rajulin on <em>Mikko 1 \u2011tietokoneen alkuper\u00e4inen kehitt\u00e4j\u00e4<\/em> ja yksi suomalaisen mikrotietokonehistorian keskeisist\u00e4 henkil\u00f6ist\u00e4. H\u00e4nen taustastaan ja urastaan l\u00f6ytyy luotettavaa tietoa erityisesti Fujitsun <em>mikrohistoria<\/em>-sivustolta, joka toimii ensisijaisena l\u00e4hteen\u00e4. <\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83d\udfe6 Mit\u00e4 Erkki Rajulinista tiedet\u00e4\u00e4n (l\u00e4hteet mukana)<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udfe6 1) Tausta ja ura Nokialla<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Fujitsun mikrohistoria kertoo, ett\u00e4 <strong>Erkki Rajulin aloitti ty\u00f6t Nokia Elektroniikassa 1.5.1968<\/strong> <a href=\"https:\/\/www.net.fujitsu.fi\/fi\/historia\/mikrotietokone\/1_mikko1\/index.html\">Fujitsu Net<\/a>.<br>H\u00e4n ty\u00f6skenteli aluksi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Teollisuusautomaation koekent\u00e4ll\u00e4<\/li>\n\n\n\n<li>Testaus\u2011 ja korjausteht\u00e4viss\u00e4<\/li>\n\n\n\n<li>My\u00f6hemmin suunnitteluinsin\u00f6\u00f6rin\u00e4 Salmisaaren Teollisuusautomaatio\u2011osastolla<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e4nen vastuullaan oli mm.:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>nopeusero\u2011 ja pakettirekisterilaitteiden kehitys<\/li>\n\n\n\n<li>data\u2011logger\u2011pohjaisten j\u00e4rjestelmien suunnittelu<\/li>\n\n\n\n<li>laivojen konehuoneiden tiedonkeruu\u2011 ja h\u00e4lytysj\u00e4rjestelm\u00e4t<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kaikki n\u00e4m\u00e4 mainitaan Fujitsun historiikissa <a href=\"https:\/\/www.net.fujitsu.fi\/fi\/historia\/mikrotietokone\/1_mikko1\/index.html\">Fujitsu Net<\/a>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udfe6 2) Mikko 1 \u2011tietokoneen synty ja Rajulinin rooli<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Fujitsun mikrohistoria kuvaa yksityiskohtaisesti, miten Rajulin sai teht\u00e4v\u00e4kseen kehitt\u00e4\u00e4 uuden, pienikokoisen data\u2011loggerin \u2014 mutta tekniset rajoitteet johtivat siihen, ett\u00e4 <strong>ryhm\u00e4 p\u00e4\u00e4tyi kehitt\u00e4m\u00e4\u00e4n kokonaan uuden pienen tietokoneen<\/strong>, josta tuli <strong>Mikko 1<\/strong> <a href=\"https:\/\/www.net.fujitsu.fi\/fi\/historia\/mikrotietokone\/1_mikko1\/index.html\">Fujitsu Net<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Keskeiset kohdat:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Data\u2011loggerit olivat liian suuria ja raskaita ajoneuvomittauksiin.<\/li>\n\n\n\n<li>Rajulin sai luvan kehitt\u00e4\u00e4 uuden laitteen 1970 syksyll\u00e4.<\/li>\n\n\n\n<li>Ty\u00f6 tehtiin Pit\u00e4j\u00e4nm\u00e4en Takkatien toimitiloissa.<\/li>\n\n\n\n<li>Kolmihenkinen tiimi totesi, ett\u00e4 tarvittiin <em>uusi, hyvin pienikokoinen tietokone<\/em>.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e4m\u00e4 on suora kuvaus Mikko 1:n syntyprosessista ja Rajulinin roolista sen k\u00e4ynnist\u00e4j\u00e4n\u00e4.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udfe6 3) Mikko \u2192 MikroMikko \u2013 Rajulinin ty\u00f6n jatkokehitys<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vaikka MikroMikko (1981\u2013) oli my\u00f6hempi, laajempi Nokia Datan tuoteperhe, sen juuret ovat Mikko 1:n kehitysty\u00f6ss\u00e4.<br>Wikipedia ja Fujitsu vahvistavat:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>MikroMikko 1 julkaistiin 29.9.1981<\/li>\n\n\n\n<li>Nimi \u201cMikko\u201d syntyi sanoista <em>micro computer \u2192 Micco \u2192 Mikko<\/em> <a href=\"https:\/\/fi.wikipedia.org\/wiki\/MikroMikko\">Wikipedia<\/a><\/li>\n\n\n\n<li>MikroMikkojen kehityslinja jatkoi kotimaisen mikrotietokoneen perinnett\u00e4<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Rajulin ei ollut MikroMikkojen p\u00e4\u00e4suunnittelija, mutta h\u00e4nen ty\u00f6ns\u00e4 <strong>loi teknisen ja organisatorisen perustan<\/strong> Mikko\u2011sarjalle, josta MikroMikko kasvoi.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83d\udfe6 Yhteenveto Erkki Rajulinista<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Aloitti Nokia Elektroniikassa 1968<\/strong> (testaus, suunnittelu).<\/li>\n\n\n\n<li><strong>Kehitti Mikko 1:n perustan<\/strong> ratkaistakseen data\u2011loggerien koon ja tehon ongelmat.<\/li>\n\n\n\n<li><strong>Johti pienen tietokoneen suunnittelua 1970 alkaen<\/strong>, mik\u00e4 johti Mikko 1:n syntyyn.<\/li>\n\n\n\n<li>H\u00e4nen ty\u00f6ns\u00e4 muodosti <strong>kotimaisen mikrotietokonekehityksen l\u00e4ht\u00f6pisteen<\/strong>, josta MikroMikko my\u00f6hemmin kasvoi.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\"><\/h1>\n","protected":false},"excerpt":{"rendered":"<p>Erkki Rajulin on Mikko 1 \u2011tietokoneen alkuper\u00e4inen kehitt\u00e4j\u00e4 ja yksi suomalaisen mikrotietokonehistorian keskeisist\u00e4 henkil\u00f6ist\u00e4. H\u00e4nen taustastaan ja urastaan l\u00f6ytyy luotettavaa [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1223","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/vtkkperinne.fi\/index.php?rest_route=\/wp\/v2\/posts\/1223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vtkkperinne.fi\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vtkkperinne.fi\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vtkkperinne.fi\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vtkkperinne.fi\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1223"}],"version-history":[{"count":1,"href":"https:\/\/vtkkperinne.fi\/index.php?rest_route=\/wp\/v2\/posts\/1223\/revisions"}],"predecessor-version":[{"id":1224,"href":"https:\/\/vtkkperinne.fi\/index.php?rest_route=\/wp\/v2\/posts\/1223\/revisions\/1224"}],"wp:attachment":[{"href":"https:\/\/vtkkperinne.fi\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vtkkperinne.fi\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vtkkperinne.fi\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}