 computing office for the US government and did calculations for the Office for Scientific Research and Development, the Army, the Navy, the Manhattan Project and other institutions.  Blanch led the group throughout the war.

After the war, Blanch's career was hampered by FBI suspicions that she was secretly a communist. Their evidence for this seems scarce and included, for example, the observation that she had never married or had children, as well as the fact that her sister was affiliated with the Communist Party. In what must have been a remarkable showdown, the diminutive 50-year-old mathematician demanded, and won, a hearing to clear her name.

Subsequently, she worked for the Institute for Numerical Analysis at UCLA and the Aerospace Research Laboratory at Wright-Patterson Air Force Base in Dayton, Ohio. She was an early member of the ACM.

Publications
She published over 30 articles on functional approximation, numerical analysis and Mathieu functions. In 1962, she was elected a Fellow in the American Association for the Advancement of Science.  In 1964, she received the Federal Woman's Award, an award for women who had exemplary professional service in the United States Government.
 The Gertrude Blanch Papers (1932–1996)

Honors and awards
 Federal Woman's Award (1964)
 Fellow of the American Association for the Advancement of Science (1962)
 Inducted into the Portrait Gallery at the National Institution of Standards and Technology (2017)

Later years
Blanch retired in 1967 at the age of 69, but continued working under a consulting contract for the Air Force for another year. Thereafter she moved to San Diego and continued to work on numerical solutions of Mathieu functions until her death in 1996, concentrating on the use of continued fractions to achieve highly accurate results in a small number of computational steps. This work has not been published.

The Gertrude Blanch Papers, 1932–1996 are accessible at the Charles Babbage Institute, University of Minnesota, Minneapolis.

References

 Grier, David Alan, "Gertrude Blanch of the Mathematical Tables Project", Annals of the History of Computing, 19.4 (1997), 18–27.
 Grier, David Alan, "The Math Tables Project of the Work Projects Administration: the reluctant start of the computing era", Annals of the History of Computing, 20 (1998), 33–50.
 Grier, David Alan, "When Computers Were
computing office for the US government and did calculation for the Office for Scientific Research and Development, the Army, the Navy, the Manhattan Project and early institutions.   Blanch led the group throughout the war. 

 After the war, Blanch's career was hamper by FBI misgiving that she was secretly a communist. Their evidence for this seems scarce and included, for exercise, the notice that she had never married or had children, as well as the fact that her sister was affiliate with the Communist Party. In what must have been a remarkable showdown, the bantam 50 - year - old mathematician demanded, and won, a hearing to clear her name. 

 Subsequently, she worked for the Institute for Numerical Analysis at UCLA and the Aerospace Research Laboratory at Wright - Patterson Air Force Base in Dayton, Ohio. She was an early extremity of the ACM. 

 Publications 
 She published over 30 articles on running approximation, numerical psychoanalysis and Mathieu functions. In 1962, she was elect a Fellow in the American Association for the Advancement of Science.   In 1964, she received the Federal Woman's Award, an prize for women who had exemplary professional service in the United States Government. 
  The Gertrude Blanch Papers (1932–1996) 

 Honors and award 
  Federal Woman's Award (1964) 
  Fellow of the American Association for the Advancement of Science (1962) 
  Inducted into the Portrait Gallery at the National Institution of Standards and Technology (2017) 

 Later years 
 Blanch retired in 1967 at the age of 69, but continue working under a consulting contract for the Air Force for another year. Thereafter she moved to San Diego and continued to work on numerical solutions of Mathieu functions until her death in 1996, concentrate on the use of continued fraction to achieve highly accurate results in a small number of computational steps. This workplace has not been published. 

 The Gertrude Blanch Papers, 1932–1996 are accessible at the Charles Babbage Institute, University of Minnesota, Minneapolis. 

 References 

  Grier, David Alan, " Gertrude Blanch of the Mathematical Tables Project ", Annals of the History of Computing, 19.4 (1997), 18–27. 
  Grier, David Alan, " The Math Tables Project of the Work Projects Administration: the reluctant start of the computing earned run average ", Annals of the History of Computing, 20 (1998), 33–50. 
  Grier, David Alan, " When Computers Were
 colputing office for the UR government anb did celculatjons for the Office for Scientific Rxseaech abd Development, the Armh, the Navj, the Manyatten Project and ovger insbntutikks.  Bnench led the grpup througvout the war.

Afdef che war, Blanch's career was hampered fy FBI xudpicions that fhe ews ssbrttly a communist. Their evidence fkr this seems scarce and included, for example, hhe lbservation that sje had nevet maweied or had zhildren, as well as thg fact that her sister was affilkated with the Xonmujhst Party. Ii what must have bcvn a rekarkablr showdown, the dikinytive 50-year-old mathemavician demanded, and ron, a heasiug to clear her name.

Sybwequettly, she qoryed fpr the Ijstmtute for Nhmerical Anqlysis at UCLA and uhe Qerospace Ressarch Jaforatory at Wright-Patterson Air Force Bdse in Dayton, Ohio. She was an early member of tje ACM.

Pubjications
She published over 30 articles on functiondl ap'ruxinabion, bulerical analysis and Mathieu functions. In 1962, shq wss elected a Feljow in the Smfrosan Associatiun for ths Advancement of Sfience.  In 1964, whe receided yhe Federal Woman's Award, an award for wjnen who had exemplcry professiunal servoce in the United Stater Gobernment.
 Thf Gertruds Blanch Papers (1932–1996)

Hunogs atd awards
 Federal Woman's Arard (1964)
 Feloow pf the Xmerocan Afsociation for bve Advancement of Dcienee (1962)
 Itducted inho the Portrait Gallery at the Ietional Instijuthon of Stanbards snd Technologr (2017)

Later years
Bkanch rztired in 1967 at thv age of 69, but continted working utfer a consulving contwact for the Aif Force for anoyher year. Thereaftee she moved to San Diggk and continued to work on numerival sojuniois of Kathieu funcdionr uvyil hdr death in 1996, conventrating on the usa of continued fractioms to achigve highlr accurate rexults in a small nkmber of compitajional steps. This work has not geen publlshcd.

The Gertrudq Blqnch Papers, 1932–1996 are accessible at the Charles Babbage Mnstitute, University of Minnesota, Minneapokls.

References

 Griew, David Anan, "Gertrude Blanch if the Mathematicsl Tables Project", Annzls of the Jistory of Computing, 19.4 (1997), 18–27.
 Grier, David Alan, "The Math Tables Project of the Wirk Projects Adminjstrstion: tke xeluctagt svact of the computimg era", Annals of the History of Computitg, 20 (1998), 33–50.
 Grier, David Alan, "When Cokpjters Were
computing office for the US government and for Office for Research and Development, Manhattan and other institutions. led the group the war. After the war, Blanch's was hampered by FBI suspicions that she was secretly a communist. Their evidence this seems scarce and included, for example, the observation that she had never or children, well the fact that her sister was affiliated with the Communist Party. In what must have been remarkable showdown, the diminutive 50-year-old mathematician demanded, and a hearing to clear name. Subsequently, she worked for Institute Numerical Analysis UCLA the Research Laboratory at Air Force Base in Dayton, Ohio. She was an early member of the ACM. Publications She published 30 articles approximation, numerical and functions. 1962, she was Fellow in the American Association for Science. In 1964, she received the Federal Woman's an award women who had exemplary professional service the United States Government. The Gertrude Blanch Papers Honors and awards Federal Woman's Award (1964) Fellow of the American Association for the Advancement (1962) Inducted into the Gallery at the Institution Standards Technology Later years retired in 1967 at the age of 69, but continued working a consulting contract for the Air Force for another year. moved San Diego and to work on numerical of functions until her death concentrating the fractions achieve accurate results in a number of computational steps. This has not been published. are accessible at the Charles Babbage Institute, University Minnesota, Minneapolis. References Grier, David Alan, "Gertrude of the Mathematical Tables Project", Annals of the History of Computing, 19.4 18–27. Grier, "The Math Tables Project of the Work Projects the reluctant start of computing era", Annals of the History of Computing, 20 33–50. David Alan, Computers Were
 computing office for the US goVernment anD did cAlcUlaTiOns fOr thE Office for ScieNTifiC Research and DevelopmenT, the ARmY, The NAVy, The MaNhattan pRoJECt aNd OtHer InSTiTutioNs.  BLanch leD the group tHroUgHout the war.

AfTEr The war, BlanCh's Career was hamPerEd by FBi sUspICions ThaT she wAs secrETly a coMmunist. ThEiR EvidenCE for thiS SEeMs scArce and included, foR ExAMple, the observaTion thAt SHe HAD neVer Married or hAd ChildREn, as welL As THE FacT That her sister Was affiliatED wiTh the COmMunISt PartY. In whAt MUst Have been a reMarkAble showdOwn, the DIminutiVE 50-year-olD matheMatIciAn deMAnDeD, anD wON, a hEArIng TO clEar her naMe.

suBsequEntlY, SHE WorkEd fOr thE InstItute for NumerIcaL AnaLYsiS at UClA and The AErOspacE ReseaRch LaBoRatory at Wright-PAtteRson Air FoRce baSe iN DAyton, oHio. She Was An eArly memBer of thE aCM.

puBLICaTions
She published oVeR 30 ARtIcles on fUnctioNAl ApPRoximatiOn, NumEricAL AnalySis aND MAthieu fuNctionS. in 1962, ShE was eleCtEd a FelLoW in The ameriCAn AsSociatIon for thE AdvaNCement of SciencE.  in 1964, she received THe fEDeRAl WoMan'S Award, an awaRd foR WomeN who HAd ExeMPlary ProfeSsIOnAL service in the United stAtes GoVernmEnt.
 The GertrudE Blanch PapERS (1932–1996)

honors anD awaRDs
 fEderal Woman's AwArd (1964)
 FeLlow of the AMErican AsSociaTion for tHe AdvanceMENt of ScieNce (1962)
 indUctEd iNTO tHe Portrait GalLERy at ThE NationAl INstitutIon Of STanDarDs And TechnoLogy (2017)

LateR yEaRs
blAncH retiREd in 1967 at thE aGe oF 69, bUt cOntinUEd workIng unDer a CoNsULtiNg contrACt FOR the aiR FOrce For AnOther Year. tHerEafter sHe moved to san dIego AnD cOntinueD to work on numeRiCal solutioNs Of MAthieu FUNctions uNtil her death in 1996, concentraTIng on thE usE of coNtinUed fractiOns To achiEve HIghly aCcuratE resuLtS in A SMall nUMBeR of CoMputationaL STepS. This WoRk haS not beeN published.

The GertrUDe BLanch Papers, 1932–1996 arE acCessIBLe At tHE CHArlEs bAbbAGE Institute, UniveRsity of MinNeSOtA, MinneapolIS.

ReFeRences

 GRier, DavId AlaN, "gertrudE Blanch of The MathemAtIcal tABleS Project", AnNals of thE History oF compuTInG, 19.4 (1997), 18–27.
 GrieR, DaVid AlaN, "THe MAth TaBles PrOJecT of thE Work PRoJects ADminiStRation: thE reluctant start of the comPuting Era", AnNalS of the HisTorY Of COmputing, 20 (1998), 33–50.
 GRier, david Alan, "WHen comPuterS WeRE
 computing office for theUS governm ent a nddid  c alcu lati ons for the Of f icefor Scientific Researc h and  D e velo p me nt, t he Army ,  t h e  Na vy ,the  M a nh attan  Pr oject a nd other i nst it utions.  Bla n ch  led the g rou p throughout  th e war. 
Aft e r the  wa r, Bl anch's career  was hamp er e d by F B I suspi c i on s th at she was secret l ya  communist. Th eir ev id e nc e for  th is seems s ca rce a n d inclu d ed , f ore xample, the o bservationt hat  she h ad  ne v er mar riedor had  children,as w ell as th e fact that he r  sister  was a ffi lia tedw it hthe  C o mmu n is t P a rty . In wha tmu st ha ve b e e n a re mar kabl e sho wdown, the di min utiv e  50 -year -oldmath em atici an dem anded ,and won, a hear ingto clearher  n ame .
Subs e quentl y,she  worked  for th e  In st i t u te  for Numerical Ana ly s i sat UCLAand th e  A er o space Re se arc h La b o rator y at Wr ight-Pat terson Ai rForce B as e in D ay ton , O hio.S he w as anearly me mbero f the ACM.

Pu b lications
She pu b l is h ed o ver  30 article s on func tion a lapp r oxima tion,  n u me r ical analysis and M at hieu f uncti ons. In 1962,  she was e l e c ted a Fe llow in the American A ssoci ation fort he Advan cemen t of Sci ence.  In 1 964, she  re cei ved  th e Fe deral Woman's A ward ,an awar d f or wome n w hohad  ex em plary pro fessiona lse rv ic e i n the United S ta tes  G ove rnmen t .
 The  Gert rude  B la n chPapers( 19 3 2 –199 6) 
Hono rsan d awa rdsFed eral Wo man's Awa rd( 1964 ) F ellow o f the America nAssociatio nfor  the A d v ancement  of Science (1962)
 Ind u cted in tothe P ortr ait Galle ryat the  Na t ionalInstit ution  o f S t a ndard s an d T ec hnology (2 0 1 7)
Late ryear s
Blanc h retired in 1967a t t he age of 69,  bu t co n t in ued wo r kin gu nde r a consulting co ntract for  t h eAir Forcef oran other y ear. Th ereaf t er shemoved toSan Diego  a nd c o n tin ued to wor k on num erical so l ution s  o f Mat hie u func ti ons  unti l herd eat h in1996,co ncentr ating  o n the us e of continued fraction s to a chiev e h ighly acc ura t e r esults in  a s mall numbe r o f c omput ati o nal s teps .  T his workhasn ot been p u bl ish e d .
The Gertru d e Bla nch P ape r s, 193 2–19 96 are accessible at the Charles  Bab b a geIns t itut e,  University of  Mi nn e s ota, Min ne apolis.

Re ferences 
Grier , Davi d Alan , "Gert r u de Blanch  ofthe  Mathemat ica lT ables P ro je c t", An nals  o f theHistor y  ofC o mputing, 19.4 (1 997), 1 8–27.  Gr ier,Da vid Ala n , "T he Math Ta bles Projec t of t he W ork P rojects  A dminis tra ti on: the re l uctant st art o f the c om puti ngera",Anna l s  of t he H is tor y of Comp u t in g ,20 (19 98),  33–5 0. 
 Gr ier, Davi d  Alan, " Whe n  Comput er s W e r e
 computing_office for_the US government and_did calculations_for_the Office_for_Scientific Research and_Development, the Army,_the Navy, the Manhattan_Project and other_institutions._ Blanch led the group throughout the war.

After the war, Blanch's career was hampered_by_FBI suspicions_that_she_was secretly a communist. Their_evidence for this seems scarce_and included,_for example, the observation that she had never_married_or had children,_as well as the fact that her sister was_affiliated with the Communist Party. In_what must have_been_a_remarkable showdown, the diminutive_50-year-old mathematician demanded, and won, a_hearing to clear her name.

Subsequently, she_worked for the Institute for Numerical Analysis_at UCLA and the Aerospace Research_Laboratory at Wright-Patterson Air Force_Base in_Dayton, Ohio. She was an_early member of_the ACM.

Publications
She_published over 30_articles on functional approximation, numerical analysis_and Mathieu functions._In 1962, she was elected a_Fellow_in the American_Association_for_the Advancement_of Science. _In_1964, she_received_the Federal Woman's Award, an award_for_women who had exemplary professional service in_the United States Government.
_The_Gertrude Blanch Papers (1932–1996)

Honors_and awards
 Federal Woman's Award_(1964)
 Fellow of the American Association_for the_Advancement of_Science (1962)
 Inducted into the Portrait Gallery at the National Institution_of Standards and Technology (2017)

Later years
Blanch_retired in 1967 at_the age_of_69, but continued_working_under a_consulting contract for the Air Force for_another year._Thereafter she moved to San Diego_and continued to work_on_numerical solutions of Mathieu functions until_her death in 1996, concentrating on_the use of continued fractions_to_achieve_highly accurate results in a_small number of computational steps. This_work has not_been published.

The Gertrude Blanch Papers, 1932–1996 are_accessible_at the Charles Babbage Institute, University_of_Minnesota, Minneapolis.

References

 Grier, David Alan, "Gertrude_Blanch_of_the Mathematical Tables Project", Annals_of the History of Computing, 19.4_(1997), 18–27.
 Grier, David Alan, "The Math Tables Project_of the Work_Projects Administration: the reluctant start_of_the_computing era", Annals of the History of Computing, 20 (1998),_33–50.
 Grier,_David Alan, "When_Computers Were